Comparing successful business entrepreneurs starting on their own to an employee working one's self up the ranks of an established organization doesn't really make sense anyways.
It's basic math. Minority versus majority. The majority needs proper education. Only a handful become successful even though they don't have any degrees. And ANY of those will tell you how important a degree is, and they will also demand it from their employees.
It's like a million struggling actors in hollywood vs. a handful of Oscar winners.
Millions of athletes, but only a few record setting Olympians.