Like you wrote it is strange how people react on Facebook compared with Steemit.
The biggest difference there is that on Steemit you are mostly connected with people you don't know, while on facebook you most of your friends in real life, which makes it harder to neglect or ignore a post!
No requirement to drop by, it is just a post which maybe interests you. I don't do follow-you-follow-me. I do follow you cause most of your post make me think, which I do appreciate!