looks like rendering adblockers extensions obsolete with manifest-v3 was not enough so now they try to implement DRM into the browser giving the ability to any website to refuse traffic to you if you don't run a complaint browser ( cough...firefox )
here is an article in hacker news since i'm sure they can explain this to you better than i.
and also some github docs
USAA doesn't not require that I use only Chrome.
You should have read what I said before, it doesn't require you to. Consumer clients are generally immune to the problem. Not all of their customers are.
I can't help you if you choose to ignore what I say, and rely solely on your own anecdotal evidence.
Good day to you sir.