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.

This is also why many communities have failed to launch on migrating off of Twitter. They don't have a ready-made, prepped, and universally agreed upon landing site, and intersectionality of communities prevents them from actually finding one, so they're all individually faced with the prospect of leaving their online communities and starting over, or staying put.

I sit on the periphery of most of my interest groups. I'm a loosely bound valence member, and many of my interests are also just well represented here in the Fediverse, so setting up shop here just wasn't an issue. But for people who are more tightly bound, it's going to feel like there are overwhelming barriers to leaving.