Why? Apart from being seen as cult and labelled as cult, what are the real
reason something is a cult but not a valid religion; and vice versa?
By the way, back to the topic, it's really hard to define what a doctor should
For example, doctors often provide a huge dose of morphine to terminally ill patients for analgesic purposes; but this is also known to shorten the patient's life. Should you give the morphine or not then?
If you know that doing something morally good might have a morally bad effect, is your action justified? This is a pretty central point for contention in the debate of euthanasia, assisted suicide, do not resuscitate etc. It is called the principle of double effect.
(the first few paragraphs a pretty badly written in my opinion
A similar question is this:
Do you think that euthanasia, assisted suicide, not rescuing a dying patient, and withdrawing artificial life support are ethically different from each other?