What does he need a stupid college degree for?
There will be likely be a day when your son goes for a job and they will ask him: where is your degree? A lot of jobs require a BS even if you have the skills to do it without one. Is is fair? No, it just is. And sure, he can do web design free lance, but (as I’m sure you know) what works at 10 doesn’t necessarily work at 30.