Sure, some doctors have a preference not to do it, but their stake in the situation is pretty low compared to the patient. Why do we let the doctors preference

Sure, some doctors have a preference not to do it, but their stake in the situation is pretty low compared to the patient. Why do we let the doctors preference mean that the procedure becomes unavailable? Imagine if mail carriers could refuse to deliver to houses with the mailbox up stairs. Yes, its fair that they don't like it but the cost of that is people lose a vital service. In that case the mail carriers have to accept their job might include some elements they don't like.