And that is another aspect of generalized learning. When you study different things, you do learn what you are good at, what interests you and what you suck at and what you hate. I love music, but I don't have the natural talent for it or the patience to practice an instrument. That didn't stop me from studying two instruments and torturing some young music teachers. Learning for learning's sake can be useful if it tells you not only what you are good at, but what you are bad at. Learning for the sake of fun, on the other hand, is probably not as useful.
In the end analysis, college is still what you make of it. It all comes down to choices that you make.