No, there were and are huge forums which catered to pretty much everything. From chatting to dating, gardening, gaming, technology, motor trucks, all in one forum.
Reddit actually just tried to replicate these forums but with a less centralised approach, ironically, by allowing everyone and not just the forum admins to make a new category on the forum.
I think the problem is more that some people still struggle to understand how to find and subscribe to communities and magazines not on their instance.
Where are the raisins??? Σ(°ロ°)