Why is it that UX Gate Agents (Skywest in this instance) think they know better than customers who fly Regional Jets (RJ 700 in this instance) often whether or not a bag will fit in the overhead?

The UX agent on my ORD-JAX flight yesterday insisted on tagging my carry-on bag, telling me it would not fit either under the seat or the overhead. It's a soft-sided bag that easily fits in the overhead or I'm sure would fit easily under the seat if the overhead were full. I've flown RJs dozens of times & never had a problem...

I told her I flew RJs all the time & was 100% sure it would fit; she insisted on tagging it. So I tore off the tag on my way down the jetway & put it in my pocket. The bag slid easily into the overhead, just like I knew it would.

Thanks UX Gate Agent. Maybe you ought to get more familiar with your aircraft...(it is not a rollerbag..