It will end up like Reddit. But right now it isn't, and that's good enough to make a play for the users. Given a choice between that and choosing a server, signing up, finding its log-in unresponsive, looking for another server, signing up... (I haven't gotten further than this) who do you think wins?
By the way, we agree. I want a federated system to work. But simple sign-up fuck-ups, where even someone who's curious for curiosity's sake has to spend half an hour figuring out which servers even work at the moment,
I think that you're right in that the sign up UX is not great - there are also serious performance concerns, and in many ways the platform isn't ready yet. But I don't think that's going to persist for too long. I think some kind of "I don't care" instance (probably lemmy.world) will emerge, and the UX will improve. Perhaps it won't be in time, though.
Power users' power is users. We've frequently seen the celebs-first gambit by new social media entrants, most notably Clubhouse, and while it can generate hype for a bit, it's far from a proven strategy. It's frustrating to watch a re-play of Mastodon's fumbles, particularly since this time the protest is actually semi-organized.