You are completely full of crap. They do what the family wants, even (sadly) bowing to their wishes in clear violation of advance directives. So, unless the patient is completely without relatives of any kind, your scenario is 100% BS.
No t necessarily.
And yet wasn’t it in Illinois that the doctors and the state filed charges against a set of parents for not having their minor child submit to another round of cancer treatments? Sure they follow what the family wants.