Although touching is uncalled for, I don’t see how it’s weird to tell you to stop taking pics with flash. There shouldn’t be any signs about it. It’s just a given. They are working on stage and flash distracts snd blinds them. She was absolutely correct. No need to threaten her with kicking her out or being rude. You could politely ask her to step aside and acknowledge that you made a mistake with picture taking.

No need to stop talking to people or stop going places.

I think the first topic with therapist could be why you misinterpret what people say and do online and in person and how to improve. Constantly misunderstanding people leads to much suffering on your part