I realized that there are alot of inactive communities across the Lemmy and kbin instances. The beauty of decentralization is that we don’t rely on a central instance, if a fediverse instance becomes the central one that hosts the majority of posts, then if that instance goes down, we lose alot. I also suggest posting to small communities on other instances.
Having a lot of duplicate communities is a little annoying, but you do make sense.
I’d personally recommend making new communities on non-mainstream instances. Though, this does come with some problems, like visibility and instance stability (if the instance is small).