You left out the leisure value of college. I enjoyed college, for the most part. We don't talk about "returns to vacation", for instance, as being the primary way to assess the value of vacation. The main difference (and the reason this issue bugs me) is that young people are badly mislead about the financial value they should expect from college.

I also think it's pretty dubious what gains people actually tend to make in the items on your list at college. At best, college is a very expensive way to achieve those goals for most people.

Don't get me wrong, I feel like college benefited me on items 1, 3, 4, and 5, and I do recommend it for bright driven intellectually curious students. My teaching experience, however, leads me to believe it's a pretty small minority of students who should be there (in the sense that it's a good use of their time).