Because it is a protected industry! With a lousy overpriced product too!
Colleges are credential mills.
They have monopolistic control of certifications.
Pedigreed professionals aren't going to oppose this situation because it reduces competition.
Well, what do you expect from government-subsidized programs? Efficiency? Effectiveness? Don’t you know they make more money by doing the least they can for the longest amount of time? [/cynic]