'push button, get dopamine'

I thought so, too at first. But for every account i make somewhere I already need email confirmation and/or 2FA, so registering is far from "click button" -> "start" and seemingly the majority manages to make that work.

The only thing slightly complicated about the fediverse is the fact that there are interconnected instances with different services. But since we are in an early phase anyways, things will figure themselves out in the next months. I think it's going to be like this: there will be communities for all kinds of stuff and all of them will get through a certain development. In a few months or even years, there might be just a single-digit number of, let's say, football communities left, because the well-managed ones grew and attracted more users while others died down. If I want to talk about football, I can join the server with a known community without even thinking about the fediverse. But when I do, I will immediately be able to access the rest of it. Honestly, it was the same with reddit for a lot of users. A lot of people joined just for their hobby and learned about the diversity over time.