I don't like how divisive this is. I am triple vaccinated. In my house we had COVID recently. DS is unvaccinated (medical reasons) and had symptoms, then DP got it (double vaccinated) and very mild symptoms. Despite my sharing a bed with him I didn't get it. So in my opinion this suggests to me that the vaccine works. We also all had it about 18mths ago.
But, if someone doesn't want the vaccine because to them there are low risks or because they had had it and it was mild then I don't think you can force people. It's counterproductive.
It's not clear why this doc doesn't want it. He either thinks he's had it and it's no big deal or he is worried about side effects or both. Or that he is probably immune. Who knows. And he might be right until a more deadly version evolves.