Absolutely. When I was on Reddit, all the subreddits I joined were very niche: cities, fandoms, parody subs, and the like. The main reason I found them was because I could think of something and go "it's Reddit, there's a subreddit for anything".

That's pretty powerful when you're trying to build a community, since you can skip the "we exist" and "look here to find us" parts of the pitch and spend time and effort on the community itself instead.

Lemmy/KBin just doesn't have that appeal yet. Pretty much all the subs here, while by no means bad, are very "general-interest", and the interface to find them is clunky, especially if they aren't on your home server.