I'll comment on this, second hand from my wife who was the Nurse Unit Manager of a palliative care ward for over 10 years.
When she started VAD was virtually non-existant, but when she retired it was becoming more available.
She was and still is a supporter of VAD, because she pointed out that when someone was in extreme pain, they were often so "drugged up" with pain killers to the point where their bodily and mental functions shut down that they died anyway.
She sometimes asked if this was akin to murder/manslaughter, because by the time this extreme medication was being administered, they had no say in what treatment they were prepared to accept - because they couldn't say anything.
I certainly want the option if I need it and will fight tooth and nail to get it.