OP, listen to the surgeon and make an informed decision. Ultimately, only you can decide whether your season is over and I'm guessing you're still young so should heal pretty fast. A cast offers a decent amount of protection, after 2-3 weeks i cant see why you won't be able to ski if you take it easy, but you'll know how it feels at that time. Don't be an idiot and ski if it hurts. I broke my hand three years ago and didn't follow the doctors advice, right now my hand is fucked and I'm not sure it'll ever be fixed. Every day its cold, I'm I'm pain. You don't want that.