To fly for the airlines you'll need a college degree, probably with a >3.0 GPA. I agree it's not as academically rigorous though (unless you count the USAF route). Also, most people I've seen do the 250 in as short a time as possible or go part 141 which is a sort of direct-to-CPL training program. Right now there's a shortage of airline pilots but traditionally, those 7-8 years you mention would be spent at a regional before you have a chance at making enough money to start to really service all the debt you undoubtedly have at that point.
Obviously they're pretty different career paths, but they're both effectively 'trades', in a more traditional sense, that require obscene amounts of training.