By the same logic, medical schools are counterproductive because by making getting a degree harder make giving healthcare advice harder. Ditto for law schools.

If you are going to throw your lot with an employer, you want to be very sure that said employer is willing to go the extra mile to bring you up and see you succeed; and yes, that will be harder that going to work for the first john that waves a $20USD bill in front of your nose.

Employment does not make sense otherwise. No regulation, or much relaxed regulation, would be the equivalent of owning a capital intensive company that signs a deal to work exclusively for one customer. No sane investor would want to put more than 5% of their networth there, and only in the case that said investment paid heads and shoulders above the next best option in the market. So why do you expect employees to invest 100% of their time and effort in such a Devil's deal?