You are not mentioning the crucial difference - Facebook has the pages and stuff for posting the media content. Individuals use it for family binding, finding relationships, keeping up with the friends and watching those awkard ads all day long, oh, don't forget the Face-Insta egoboosting combo drug. On the other hand Steemit is a community similliar in some way to Reddit or imgur, in which writers and content creators are contributing to the wellbeing of the community spirit with quality posts with a difference that we are actually getting paid with a cryptocurrency depending on the quality, popularity or overall creator prestige we own.