What about opportunity cost (re: absurd amounts of money)? Do you have a better job because of all the things you learnt or because you went to school and got a degree?
Do you mean valuable as in it got you a better job or in what sense?
As someone who is happy they went to college despite it not directly helping get my current job, I believe it was valuable in that it made me more open to new things, better at developing relationships, and exposed me to different points of view. Worth the financial cost? That’s certainly debatable, but it was ultimately my decision to go and keep going.