I think dementia and euthanasia is already legally and morally very complicated so not sure that is the best example. I do think that dementia often causes problems due to strain on caregivers and cost of outside help. If you have systems of support and resources for these caregivers, then fewer people would be inclined to end their lives to avoid becoming such a huge burden. If you legalize euthanasia and have good frameworks for people to use to determine where their limit is, then people who don't want to become a burden aren't pushed to kill themselves while they still have time.

There are lots of ways we can change systems and institutions to change the choices people make and I see good people working to make that happen.

I guess it is a kind of a platitude. I'm not trying to claim that such changes are easy, simple, fast, or even obvious (though some may be.)