$0.02: The "appification" of internet appliances and services (e.g. Phones, tablets, and commercial social media) has shifted user expectations to consumer expectations. People are used to a plug-and-play experience with robust and popular services providing experiences "where all your friends are."
Meanwhile, Fediverse tech is built on top of what we had before: disposable services and vendor-neutral clients. The only app you really need is a browser, and you should be prepared to move around to different service URLs over time. As experiences go, it's almost downright agrarian, in that everything has a season and anything could be destroyed by some disaster and replaced just as quickly. So, it takes a little more effort, which is the exact set of detractors that social media companies capitalized on.
Anyway, this difference between user experiences is always going to be a problem for adoption. It's easy to see it as lazyness, but the reality is one of convenience and how people prefer to spend their time.