If the only tool you have is a hammer, everything looks like a nail. Thus there's going to be a natural inclination for Surgeons to want to do surgery.

That doesn't mean that surgery isn't the answer in the OP's case.

It does mean it may be worthwhile for the OP to research the issue, and get another medical opinion.

An Orthopedic Surgeon who works on collar bones is obviously qualified to give the OP the data he needs. That doesn't mean that the OP should blindly follow the physician's advice, where the decision is ultimately a judgment call, and is likely affected by his individual priorities. (i.e. healing time, cosmetic issues, cost, versus potential complications.) Doctors have no monoply on making value based decisions.