It is the doctor's job to decide what is best for the patient. That is the only moral issue. If a patient requests a doctor to do something that is harmful to themselves, it is the doctor's duty to refuse.
- Doctors shouldn't give narcotics to patients at risk of addiction, even if the patients ask.
- Doctors shouldn't give antibiotics to a patient who doesn't need them, even if the patient asks.
It is a judgement call in each case and people might disagree with these decisions.
Doctors aren't just medical shopkeepers who will give a patient whatever she asks for with no regard to whether it is harmful or not. Doctors are supposed to act in what they see as the patients best interest, this sometimes means telling a patient "no, I won't do that".
This includes face-lifts, teeth bleaching and all the other elective medical surgeries you list. If a doctor feels any of these procedures is harmful to a specific patient (given their specific circumstances) it is the doctor's duty to refuse. It isn't morality, it is a judgement about whether the procedure is harmful to the patient.