I don't think most people who are new to the fediverse really want to see three dozen threads about the fediverse as they scroll. I couldn't possibly convince somebody to join the fediverse to talk about fashion, because there's nobody here talking about fashion, it's like going to a baseball stadium to talk about library science.
People are going to Threads instead. When I point out how shitty Threads is and how people should use Mastodon instead, they say, "you're right! Threads is shitty! I'm gonna go use threads." Because threads is a social network and mastodon is a theory.