Nah, it's more a combination of memeing and that the avatar interface in VR Chat is horrible. Picking an avatar takes a lot of work. Some of the ones listed can crash some machines. Many of the ones listed are only available on the PC version, so you get some "PC-Master-Race" posturing. And there aren't a lot of good, default options, so you end up with a lot of people picking the same avatars. There are lots of other avatars, but most of them are very unhuman-like and several are just plane bad.

EDIT: for what is worth, I tangentially work on the same sort of software. My system is a training environment not intended for the public, but a lot of the same concerns are involved. Currently, we have no avatar selection system. Everyone gets the same avatars, differentiated by a name tag. This was 50% a deliberate decision to avoid avatar mayhem and maintain an egalitarian environment, 50% pushing off the problem until I can figure out how to give some options without devolving into avatar mayhem.