Celebrities are living a very unusual life compared to everyone else. They're always in the public eye and they can't go out for a walk without getting bombarded by fans.
In some ways this is true but in other ways, it's just an amplified version of what everyone deals with. Obviously, the people you encounter in your day to day lives are not your fan club but they are kind of similar in that most of the people you will encounter in life will either think they know you or they will make a lot of assumptions about you based upon....
1. What they already know about you
2. What they can see when they first see you.
That is to say that it is similar in that a celebrity deals with a fan club filled with people who make a lot of assumptions. And while usually, the fan believes that the things they are assuming are flattering to the celebrity and that they are good things that are desirable, this isn't necessarily true. Sometimes you can see videos where a celebrity meets a fan and the fan flips out and drools all over them and you can see the cringe but you can also see the celebrity not wanting to make the cringe noticeable.
So in a way, you are not a celebrity but you also cannot really go out into public without someone noticing you and judging you. These are the things that keep SA people up at night. Hypersensitivity. Celebrities tend to have a lot of SA traits sooner or later because they will eventually be exposed to honest people who let it all hang out and they cannot deny that the things they fear other people are thinking are actually the things other people are thinking.
You will not necessarily encounter a lot of people who will just come right out and say what they're thinking (but it probably will happen from time to time). Celebrities infamously will almost always encounter a lot of the "biggest fan" types of people.
I think there is value in observing those types of things even if you're not a celebrity. The average SA person may not be a celebrity but the average SA person FEELS like they're always in an uncomfortable spotlight whether they actually are or not. If that is how someone feels, that is their reality.