You have a very good point. Post doesn't have to be long form writing in a blogging community such as Steemit to be valuable for the community. Through my curation efforts I see so many "Sham Shield" post, from short form to long form articles; usually posting a youtube link, or copy/paste from other Internet resources changing a couple of lines of text here and there.. But it is pretty simple to not do that, and come up with something meaningful by just writing about your own thoughts, ideas, opinions and all. Even musicians using Steemit to post their work, many of them simply post their music. But how cool would it be when the artist adds some of his/her own thoughts to whatever is posted. It'll be the only way for a crypto based blogging community to survive, to have the majority of the posts to be somehow meaningful to parts of the community; and as you state: this can also be short form posts.