For the moment, a lot of the fun on some of the federated platforms is behind several steps of effort that many of the corporate platforms have streamlined people out of being accustomed to taking, which is part of why they’ve kept their larger audiences. If a single click/tap is too much, that’s enough to keep some people away from here.
It’s not a matter of laziness either, it’s more of, how much effort do I want to put into something that I’m using for casual entertainment? For many people it’s minimal, but many federated platforms currently don’t really work like that. They’ve arguably thrown the baby out with the bathwater in an overcorrection away from commercial algorithmic feeds since existing platforms have conditioned people to not have to put effort into finding silly/fun content.
The types of people to post won’t be as inclined to post if they find their posts aren’t reaching people because people mostly have to actively seek them out to engage with them at all. The types of people to more passively engage won’t be able to as easily as those posts they might engage with may never reach them because they mostly have to actively seek them out. The end result of a lack of feedback and content for both types of people, despite there being a possibility and existence of both for them, results in this recurring sense of dissatisfaction.
Note that this is written largely with Mastodon in mind, and to a lesser degree Lemmy. In Lemmy/Kbin/Mbin/PieFed/Sublinks’s cases I think they’re potentially better off in terms of structure and offering different ways to sort one’s feeds, but it’s a matter of more people joining to round out communities and discussion more.