Sounds to me like your family friend’s mother would have died more pleasantly if euthanasia were legal.

There are plenty of ways to pressure people into death, as you have already demonstrated. That’s not going away.

Emotional burdens to encourage people to live as long as possible even if you think they’re suffering are likely a far bigger problem. People know it’s unethical not to euthanize animals that are suffering. Lacking the social apparatus to suggest euthanizing humans is almost certainly a huge moral weakness.