Isn't it true that if you break your college hockey commitment the college can report you to a credit agency? While you have the right to dispute the claim with the credit bureau, in all likelihood you won't be able to buy a car, rent an apartment or get a student loan to go to graduate school. It stays on your record for seven years.
Breaking your college commitment is something that doesn't look good on your permanent record.
Most guys would rather commit to an Ivy or not commit at all.
Philosophical Thoughts: The Lowdown on College Commitments Or 'Are Those Things Real?'