Spend some time around the cancer wards of the VA hospitals. There's a lot of guys in there that say they always believed they'd be able to "take care of it myself if it comes to that". Problem is many find themselves in a hospital with no gun.
The problem is USUALLY solved by a family member in the final hours...when all restrictions on "the button" are removed...almost ceremoniously... by the nurse.
If folks count this as euthanasia then it's likely 10% or more of all deaths in the USA are euthanasia. And very, very few people would eliminate this protocol.
There's a line between pain control and euthanasia. Trained professionals (and the control unit behind that little pain medication button) know the difference.
What we are talking about is how many people are killed by their doctors.