I know some very successful people without college degrees. Now, there are certainly instances when you MUST have a college degree. Doctors. Dentists. Engineers. I won’t argue that.
However, if we assume that by “good job”, you mean “good PAYING job,” there are plenty of examples of folks who have carved out careers in sales, coding, construction... etc. who all make excellent wages.
Additionally, why must businesses fail? If that is “usually” the case, how come some people (again, plenty of examples both with and without degrees) seem to be able to consistently build businesses and do very well, while other people couldn’t build a profitable business with the “right” degrees and millions of dollars in start up capital? What do you think makes the difference?