This is the biggest source of friction for Lemmy and the Fediverse. Non-tech savvy folks will not make the shift if it is such a pain to find the communities you want to join.
Adoption cycles are older than dirt. Only the innovators have to go alone, and they have a thick skin and a romantic notion of adventure. Just wait for someone to point out the new thing, and you can still be an early adopter. You can join in telling the late adopters that this forum is not appropriate for your peripherally related topic and you should post your question in X.