Well, the causality from views -> likes seems certain, whereas the causality from likes -> views is uncertain. Also, comments require that you not only approve

Well, the causality from views -> likes seems certain, whereas the causality from likes -> views is uncertain. Also, comments require that you not only approve, but also have something to add, whereas views are perhaps driven more by how often they are forwarded. So, a controversial or offensive post could gets lots of comments, few likes, and not forwarded to very many people, whereas a large number of likes is probably more often indicative of something you might want to show others. Just an hypothesis, no proof.