I would argue that the only low level post that would be worthwhile is the social variety. For those in the Fediverse who want this to be a place to visit everyday there needs to be posts that create a dialog of sharing life events. Some of the best posts on reddit were the ones where the comment thread was better than the post. The post sparked something to share and people dog piled and created something fun and entertaining.
Maybe the Fediverse isn't big enough for that to happen spontaneously right now. But I do like when my communities/magazines ask the general low level question. It allows me to participate and not wait for a post where I have some expertise to share.
BTW, good observations and good ideas in your post.