The ugly secret of doctors and nurses is that, for many years, perhaps most of the 20th Century or more, they euthanized at will, not just infants who suffered from congenital ills, but the elderly as well.
Strongly discouraged, and quite illegal, it was still done. However, what has been forgotten is that though they sometimes wished to do it openly, they were never given this right, precisely because it would then be abused.
That is, they would have to think long and hard before they murdered someone, knowing if they were caught, they could either lose their license, or be prosecuted. They had to keep their murders a secret, and could not openly offer them, but only deal in subtleties.