[jasonyyun]

Expanding on grandalf's thought, I suspect that the alternative--that is, opting out of school to pursue a career or other business opportunity--can come off as overly selfish or capitalistic. Education is still often considered to have some sort of intrinsic value (though, of course, this is changing as students are increasingly viewing college for its instrumental value toward finding jobs); jumping straight into a career, on the other hand, is often associated (perhaps unfairly) with generating money, which has only instrumental value.

This might be an unfair representation; there is, of course, intrinsic value to many people in pursuing a career that they're passionate about, and it's becoming increasingly the case that college is seen as having instrumental value. In the minds of many, though, college is still seen as more inherently valuable, and the arguments against going to college are just making us more and more capitalistic, at the expense of culture, education, and whatnot.