In times past, people would be employed and married at about the time they physically matured. This is natural. We've deviated from this due to overly lengthy and inefficient education. We're losing years of employment, affecting total lifetime earnings. We're losing years of low-risk childbearing. If you can get your education completed before you mature, then you can start your independent family life at the natural time. You can have a paid-off mortgage-free home and several children by age 20.
I have a coworker that we hired at 18. He showed up with a degree and even some previous professional work experience. He has done well.
By "doesn't mean that college is a good place for a", you seem to imply that something other than college is a good place for these young people. I don't know what that would be, because the obvious alternatives are surely worse. High school can be pretty toxic and useless. Bad stuff can happen anywhere. At least college offers more freedom and respect than high school does, even if it is still 70% a waste of time.