Nah, doesn't really work for me. Most topics I want to follow, hashtags are either not used, or used too broadly so I'm not really interested in what I get, or used too often so my feed gets filled with posts and I can't see the people I'm following.

What I do is if I want to see somebody's posts but I don't want to see all of their posts, I put them into a list. Then if they boost a post I like, I check out the person's account and either add them or don't add them to the list. Doesn't work too well, but it's not awful either.

And then I also have 1 hashtag pinned (Moshidon feature), so that I can see the posts on it without getting them in my home feed.