I think even if it’s not one of these situations, being approached is uncomfortable unless you are interested in the person. People are way more isolated now and less socially aware, which means half the people who do approach will not understand when the other person isn’t interested, and end up making it a bad interaction for both people rather than just a short uncomfortable one.

Being isolated also makes people act stupid, which makes them ask out their server cashier etc even if they know they shouldn’t. They just need someone to be with, and they see a positive interaction and go for it. It’s like someone who’s starving stealing a lot of your food, it’s still their “fault” but it’s not really surprising they would do that.