I doubt you're having a logical discussion about science here, so trying to convince him with scientific arguments is futile. Giving the guy the benefit of the doubt, he has been trained to think he's supposed to help you and he wants to However, the system has tied his hands. He can fight the system, cause himself a lot of trouble, and still not give you any substantial help, or he can live in the safe fantasy world that the system works, he can advise a good treatment and send you on your way and it's your fault if you won't do the best treatment available. We can see which he has chosen to do.
I'd say move on. You're not going to get anywhere with this one.