If you've never in your live chosen anything that has to do with IT, if all you know is centralised, monolithic silos, then you can't be expected to first choose one out of literal dozens of microblogging projects in the Fediverse and then one out of dozens, hundreds or thousands of instances.

The Fediverse would be a whole lot smaller if not all newbies who didn't come from Reddit were railroaded hard to mastodon.social. Oh, and Lemmy would be a whole lot smaller without Redditors having been railroaded first to lemmy.ml and now to lemmy.world.

I feel with mastodon it's different because instances don't host communities to subscribe to. Just people to follow