This is going to be a short and sweet little history of Reddit. Reddit was founded in 2005.
Take a look at what Reddit looked like in 2006: https://web.archive.org/web/20061206235353/http://reddit.com/
Note that it didn’t have subreddits back then because the user base was too small.
Look at Reddit in 2008 (December 31): https://web.archive.org/web/20081231080128/http://www.reddit.com/reddits/
Politics had just 72,314 subscribers. Technology had 85,678 subscribers, and the “Nicher” Food subreddit had only 4,438 subscribers.
Lemmy/Kbin follows the same path. Initially, generalist communities like Politics and Technology will have the most momentum and gain subscribers, just like Reddit did back then. As the user base grows, “niche” communities will be able to sustain themselves.
Let’s not think about the Reddit of today, let’s think about Reddit of old. Rome wasn’t built in a day.
Admins did take steps against far-right instances. But I didn’t even mean politics, but more stuff like Redditors coming here and trying to import toxic stuff that Reddit used to allow, the whole “I’m gonna stalk you and downvote you everywhere” retaliation mentality because of karma, the low-effort comments and the flame baits (which Reddit loved since it created more engagement) etc…
I’ve already seen a couple of downvote-you-everywhere people being called out for doing it (votes are accessible in ActivityPub, and public in kbin).
I don’t think it’s as easy for them to flourish here.