This is an opinion without anything backing it up but a grouping of instances with a lot of users. I believe that there are a lot of bot accounts, but you need to do more than just state a hunch, friend.

I suspect the bot problem will be real for a bit before coded mitigations/solutions are developed.

Considering how much new content I’m seeing on various instances, I don’t have any reason to doubt that large numbers of actual people are creating most of the new accounts.