I agree, I am all in for good content but you can't forget that the success of social media comes from people being able to express themselves in any way they want.
I think that the main Steemit page should be able to have a bar for long posts, one for pictures, one for videos and another for short posts (Twitter kind of post)
After all, if a person is able to communicate something important in less than 200 characters, isn't that good content as well?