I don't know if we're talking past each other or what
but there is a clear, fundamental,
legal difference between removing an endotracheal tube that results in death and giving a drug that results in death.
One is respecting the patient's (or POA's) wish to
refuse futile care, and one is not
stopping care.
It's the difference between taking your hands off the patient and putting your hands on the patient.
Now again, I don't have a moral or ethical opposition to actual bona fide euthanasia for end-of-life care. But the legal difference between pushing 2 mg of fentanyl and extubating a moribund patient is starkly clear, even if they both die 5 minutes later, and
anyone who does the former shouldn't be surprised in the least if he finds himself in court at some point.