So what happens when these people jump ship three years in and decide to set up shop somewhere they can actually make money? What counts as a "business"? Anyone who can afford to start up a business right out of college probably has the money to just... pay the student loans. Things like rent and utilities for the business are going to be higher than your student loans in the first year alone, even in the ghetto, unless you're working out of a food truck or you convince a bunch of your fellow students to join in as part owners (and who wants to fucking deal with that for 3 years?)
Seriously, fuck off with this boot-strappy bullshit. College isn't just supposed to be just for producing doctors, lawyers, engineers, and small business owners... we need artists, historians, writers, musicians, and philosophers too and the privilege to be one shouldn't solely belong to the upper fucking classes. Just fucking make college free to people who make meaningful, dedicated progress towards their degree.