A patient who requests a treatment option that the doctor cannot provide is obliged to go to another source. For example, if a cardiologist needs the opinion of a respirologist, he will seek the opinion of a respirologist. It's that simple.
Some doctors are willing to offer medical assistance in dying and some patients ask for it. It is not for the doctor to say whether it is right or wrong. The doctor must assess the patient. All those who offer medical assistance in dying must do so, and must continue to do so. One does not exclude the other.