Assisted euthanasia should be a deliberate, purpose built process. Overseen by a doctor, and a guardian social worker, independent of the family and the state, to see at the persons wishes are carried out.
That being said.
>"In those years, I saw the Dutch euthanasia practice evolve from death being a last resort to death being a default option."
That's absolutely not ok. I would go so far as forbid doctors introducing this option to a patient; I would favor leaflets and online campaigns and have a discussion only _after_ the patient brings it up. At least in Netherlands (and Canada) everyone is aware of being an option, so it's not like the patients will suffer without knowing it exists; but it might reduce some pressure on people that don't need to take it just yet.
How often one hears, usually after sexual assault: "they were such a bright, chatty person before, now they're withdrawn, have panic attacks, PTSD, they hurt themselves etc." That's personality death and it comes from denying bodily autonomy.