They're full of shit.
Fuck i hate surgeons sometimes, well nurses in this case. The don't know! They don't deal with the patient the second they leave the hospital where the surgery is done. They don't have to deal with all the fuck ups, your rehab people do.
You can return to walking on it after 2 weeks, that doesn't mean you can snowboard on it without hurting yourself again. So fucking retarded that pisses me off.
By not using your quads, you lose a crazy amount of strength in the 2 weeks. This leads to tearing an ACL or some other shit.