Agreed that corporate is definitely trying to extort tips with the new payment software, but I actually have to say the flight attendants do a good job of not making it uncomfortable not to tip them and clearly the crews themselves aren't exploiting it.

Every time I've flown them with the new option to tip the flight attendant hands me the device to sign and simply says "select an option" while they walk back to the cart or turn away to help another customer, and like you, I don't click the tip. I think they do a pretty good job of not pressing you to tip whatsoever

I've always found the crews on F9 to be quite friendly, it's the customer service on the ground that's the problem.