Of course I would stop at their request, however if I were that person with PTSD, I wouldn’t expect the world to cater to my disabilities and strategise on how I could function in society by managing it. That’s what I currently do with my own PTSD and it makes me a stronger person for it.

Also, that’s hardly comparable to using the phrase “you guys” in a conversation. That phrase has always been gender neutral and far nicer sounding than “you people” or “you all”.

Edit: and also, yes I would have no idea on why the other party would take offence to the phrase “you guys” but I would also be under no obligation to establish a friendship with them beyond that conversation. I don’t expect someone I’ve just met to trauma dump on me and I don’t want them to.

Of course, I would correct myself in that conversation and not use the phrase “you guys” after they’ve told me not to use it, because it’s polite to do so, but that won’t stop me feeling that I can’t be myself around them.