I just don't think there's enough active userbase for that, and it really isn't something you can fix on the fly. The ratio of Like/Upvote > Share > Comment > Post is always an issue for online social spaces, its just that a few website got big enough to make it seem like its easy to get people to contribute.
The architecture of Lemmy is also a little bothersome at times, especially when it comes to displaying media and making gallery posts.
Probably one thing I'd like for LemmyNSFW to have is a Admin owned community for people to share communities and talk about merging, managing, sharing, etc. Something like https://lemmy.world/c/newcommunities but for our side of the pond, and now just for new but also talking about present communities and what can be done for them.
Despite what the internet would lead you to believe, body type is not directly correlated to being dominant or submissive. Neither does gender, sexual orientation, clothing or anything else on the surface. The type of person you are sexually, your preferences, your kinks, are only going to come out when you sit down and talk to your partner - or viewers - about it. Otherwise, its just folks making assumptions - and generally forcing standard hetero-normative gender roles into non-standard relationships or people. A big, bulky, tough guy can easily be submissive in bed, just as a soft-spoken, short man can be a cold dom. And the idea of a bottom dom would make some dude's brains explode. At the end, its about personality, not looks.
So the answer is, unfortunately, this isn't something that can be "fixed" because its not a personal problem. Its just people having an uneducated perspective of how sexual relations work.