>>12899225nta, but as you might have found out through googling, it's an idea in economy that if there is something easily accessible for everyone to use, people will deplete that shit until no one can use it anymore. As in there are no good interactions left to be had because now it's full of weirdos. I don't know if he meant that though.
As for your original question, I think he has a point about how people in an anonymous environment tend to volunteer traumatic and weird shit about themselves much more willingly so you can easily get the feeling that no one around you is normal in VRChat. I have seen it happen with chat platforms 10 years ago, but I can't speak for VRchat specifically.
