no dignity in dying
If power of attorney can be hacked by greedy relatives and a too-busy, bribed or blackmailed doctor (and I'm aware of controversy here), hacking consent for an assisted suicide enables them to get their hands on the money that much sooner, and it's not as if safeguards on the latter would be more stringent than those on the former. The claimed ethical case for this presumes such systems can't be hacked and judges and other officials are always honest.