If you're going to spend the time and money to pursue a four year degree or beyond, you ought to have a very clear understanding of why you're doing it and what your goal is as well as what it's actually worth to you. Otherwise you're going to wind up with little more than a useless degree and some peculiar memories of how you spent your free time.
Unfortunately as others have noted, college in the U.S. now is a default - everyone goes because they're expected to, because it puts off adulthood for another four or more years and because if you don't go you're viewed as having fallen below some basic threshold of minimal achievement and therefore have failed or been denied an "opportunity" that's close to an entitlement. A hugely dysfunctional set of attitudes.
Full disclosure - I have a four year degree. I did further study but didn't pursue an M.A.