I don't see why that has to be the case. My posts it showed were about a new job I got in town, when my girlfriend got her first full-time teaching job, the completion of a really difficult junior year. I was impressed with how many interesting things it pulled out while avoiding drunk posts and party pictures.
On the contrary, Facebook is a great platform for important, meaningful things. It's just that most people don't think to use it that way. But I also think most people want to consume important, meaningful things, which would mean there's room for important, meaningful posts.
