@Rentlar Ahh, yeah, on Lemmy it is the reversed, you get far too much content from the highly active groups, drowing everything else.
On the microblogging side, that's the thing, the "Local" / "For You" feed was just meant to see what's going on. On platforms without an algorithm, it shows everything. But on platforms like Threads, it controls it (but still, if there is barely any data the algorithm can work on, it's as good as not having any algorithm). So in the end, it goes back to being an end-user effort (or issue) why they see what they don't want to see, and don't find what they want to consume.
For platforms with an algorithm, they have to help the algorithm by providing it data. They need to like, follow, comment, on content they like to see more, instead of randomly interacting. If they don't change their method, the data will be built upon their random liking/commenting, and then complain about it.
For platforms without an algorithm, if they kept on following accounts that talks about tech, of course most of what they'll see are tech. Hence the complaints about "the Fediverse is for developers only" or "the Fediverse is all about politics".
Some claim the Fediverse lack moderation tools, yet, people complain about the same things over in The ATmosphere network. How they kept seeing politics or tech mumbo jumbo.
So, at the end of the day, it's an end-user effort/issue. The platform developers can only provide so much assistance and tools, but if the end-user doesn't grow their "observable network" properly, then it won't work for them regardless which platform they use.
The "Local"/"For You" feed is just for finding new content, for expanding our network. And yes, if some groups or topics are filling this feed, the server admins should have tools to throttle certain groups or topics, so as not to defeat it's purpose as a discovery tool. Otherwise, what you shared will indeed happen. (And I guess this is where an algorithm works best, like how it is in Threads (if there is enough data of course).)