Stanford on its own is one of the top golf programs in the country. Its practice facility is absurdly good (my team was able to use it once when we were out there. The reason we were in the bay area? Because we took our spring breaks to go play fancy courses with rich alumni to get them to donate to the athletic department, which is another part of money you don't see but athletics gets.) You need to be really, really good to play at Stanford.
Second, college golf is a case where, because of the niceties like practice facilities, tournaments, where you don't pay for any of that, it's a feeder to the main tour. In fact, PGA Tour University[0] came out to help get guys who were good in college to the Tour quicker. The quality of guys in lower level tours is crazy, and this is a deserved bumper for the good guys. Guys play in college first because that's where you grow.
I'm very anti-NCAA. Each sport is different in terms of growing to the professional level though, and how engrained the NCAA is in most cases though makes it tough to have an overall solution.
[0] https://www.pgatour.com/university/what-you-need-to-know-faq...