Get a second opinion and find a sports medecine doc or a doc who skis.
Last season I broke my finger. I went to my Doctor who happens to ski
He sent me to the orthpod to put me in a cast and told me to be careful since he knew Id ride anyway. Then he went over the risks I was taking if I crashed again. Serious pain and the potential to injure myself badly enough to need surgery etc...
of course the orhtopod was like "oh hell no you can't go snowboarding with a cast!" they thought my Doc was nuts. lol. Also, it felt kinda badass to ride with a cast on, I won't lie.
now I had a minor fracture not plates and pins and stuff but I also was boarding less then 10 days from the break. You'll have a bit more recovery.