I think it depends on what you want to do. The current system almost requires a degree for STEM jobs. It shouldn't be that way, but that's how it is. If you don't want to do a STEM career though, why waste your time?
My son went straight to college at 16. He has a 14 year old in his school with him. I work with a man who's son went to college when he was 12. That dude is super smart though. My younger children will skip high school completely.