I think the most important thing is not to tell people to quit FB or stay on FB (which you're not doing, you're just talking about your decision), but to encourage people to make sure they are enjoying themselves and that they are using FB in a way that works for them personally.

If what works for them is to quit, great. If what works is to use it for all the reasons people mention, great.

We don't all have to use these tools for the same reasons or in the same ways. It seems people don't get that.