If I had to guess, the pilot was already seated in 3D and saw 3F come onboard in crutches and stumbling about and noticed they're in the inside seat. Pilot suggests for that pax to just take 3A as most people really don't care whether they're in 3A or 3F.

That pax just sits in 3A and thinks they're following instructions from AA staff. So in this situation not sure it's fair blame that pax for just assuming they could take 3A.

This all based on the fact it was the pilot that spoke up and asked about switching seats, not the pax already seated in 3A. If the pax in crutches had just plopped down in 3A, then the pilot would have never known.

We don't know that. The swap here was between 3A and 3F. The pilot in 3D may not have any actual skin in this game, and was simply trying to help a passenger on crutches. It's not like the pilot took OP's seat. If all the pilot did was ask if OP would switch seats on behalf of another customer, not unlike an FA might have done, that's not an AA employee changing their seats for a revenue customer's.

It sounds like it was still framed as question: "Do you mind switching seats?" is the direct quote from OP, and that's not a decision or an order. OP was perfectly free to decline. OP even seemingly perceived this, as they chose to negotiate to remain in an aisle seat. The pilot didn't want to elevate a 1:1 seat swap into musical chairs and at that point directed OP to the FA, who is probably the right person to have been involved in this in the first place.

None of that sounds like a violation of company policy, and it could all be as simple as the pilot trying to help a passenger with limited mobility. If OP has an issue with the attitude of the pilot (the perceived eye rolls, etc.) or felt the pilot was ordering OP to change seats instead of simply asking, then sure, by all means write to AA.

Regardless of what you think about behavior of individuals here, I don't think there would be much factual controversy if I said the A seats are likely better for the passenger on crutches than the D seats. In addition to not forcing someone on crutches to get all the way over to the F seat, the passenger in the A seat doesn't have to get up for anyone else, whereas if they sat in the D seat, they'd need get up whenever the window seat passenger wanted out. So no, the pilot didn't offer their own seat, but there's still a valid argument to be made that the pilot tried to get the passenger the best seat for their situation.

And again, no one got forcibly switched. "Do you mind switching seats?" is a question, not an order.

Yes, I agree that if the pilot (assigned 3D and staying there) tries to arrange a seat swap between two revenue passengers (3A <> 3F), then it's not a company policy violation. Not in the job description but certainly not a policy violation!

My first read of the original post had me thinking that the allegation was an AA employee requested a seat swap with a revenue pax for the employee's benefit. That would have been clearly against policy.

I would also add that, to those of us who notice such things, the [person in uniform] who took my seat, if I were the paid passenger in F, is affecting my view of their employer. Against policy or not, that's something AA could care about.

Like others have said, I will almost always do a kind thing to help someone who asks first, even if it inconveniences me a little. (I have mobility issues myself, but not bad enough to require an assistive device at all times, just sometimes. Maybe 10% of my life? But I always travel with my cane because flying is so fraught.)

I also react much more negatively after something I expect (an assigned seat) has been taken away from me unexpectedly.

Policy aside, the person in uniform did not take anyone's seat.

Can only speak for myself, but IMHO if it's not done prior to boarding then one should always be asked if they would be ok with changing seats.

I'm just curious how your seatmate (3F) was during the 3hour flight with you right beside him !

But if you receive a request from a person in uniform, especially a pilot, you feel compelled to do what they say. I know that I would react far differently to a pilot asking me if I would mind sitting elsewhere compared to a regular passenger. Assuming the person in uniform was in their assigned seat, this whole situation was absolutely none of their business and they never should have intervened. Especially if they told the person in crutches to take the other seat.
In this scenario, I would rather force crutches pax to move so I could sit on my own rather than have to endure the flight sitting next to the angry employee who is presumably irritated by me for forcing him to move. But ymmv...

The key question is was the pilot in uniform a AA pilot or a paid customer. My money is on paid customer.

Why?

In general I agree. But of all the exceptions where I wouldn�t be irritated, this is up towards the top of the list. A mobility issue is different than pure presumptuousness, and I could understand why someone on crutches didn�t go all the way into the window seat until it was confirmed other arrangements couldn�t be made.

Why couldn't the pilot have just moved over to the window seat 3F and let the handicapped individual sit in 3D? Seems like the pilot's preferences are those the pilot prioritized: they didn't appear to want to sit in a window seat.

For me it all boils down to the common courtesy of asking. I�ve had people take my seat and just assume I�d be happy to move to accommodate their wants / needs and I�ve told them in no uncertain terms that I�m not swapping seats.

I have swapped where it�s the decent thing to do (for example, a father flying with their young daughter where she was clearly apprehensive about being separated) but I have a zero tolerance policy where people just assume I�ll swap because I�m a solo traveller.

A nonrev should never be asking someone to switch seats, let alone poach a seat and ask the revenue customer to accommodate them. The offending employee should have their privileges suspended for this. I would be writing this in with as much detail as possible to identify the employee involved. It doesn't matter if they are a pilot in uniform - they have no authority to demand anything, they are not crew on your flight, and I would not defer to any request from a nonrev - or a revenue customer for that matter - that leaves me in a worse seat than I had reserved.

I totally agree with you and I also would request my 3A or another A seat in the 1-2 configuration when I�m on a paid F ticket.

Bingo! That's the first thing I thought of as well when reading the story. IMO, the pilot's actions had nothing to do with "kindness". The pilot didn't want the window seat next to the customer in crutches, so he told the customer to take 3A hoping the customer in 3A would just take 3F.