I just tend to think missing those 4 years of great experiences (to the extent you can't also have great experiences closer to home) is less important than the effect being debt free out of college has on the rest of your life. I honestly know next to nothing about finances and have made a lot of financial mistakes in my life, so I can't really tell my kid how to do all that stuff, but I can make sure she gets done with school without a huge amount of debt.
But, sure, if you can afford it and the kid doesn't have to build up debt, then sure going far away can be a great experience. That being said, I had a lot of fun during my 3 1/2 years at U.N.O.