Reddit moderates itself so well that even half the legitimate posts get immediately removed by mods or downvoted by users to oblivion
I'm not particularly interested in spending a lot of time posting on reddit. But very occasionally I'll come across a thread I can contribute meaningfully to and want to comment. Even if allowed I'd probably just make a couple comments a year or something. But I guess the site isn't set up for that, so fuck it.
I can see how it's frustrating, but the communities you're trying to post in are essentially offloading their moderation burden onto the big popular subreddits with low requirements -- if you can prove you're capable of posting there without getting downvoted into oblivion, you're probably going to be less hassle for the smaller moderator teams.