While I'm on my high horse ?:
There's this idea that euthanasia shouldn't be legalised because "what people need is just better palliative care". Regardless of what you think about euthanasia itself, this is a bullshit argument. There is very little way to palliate some symptoms to provide complete relief- and this is coming from me, who is a huge huge advocate for the role of palliative care. It's just really not the same. And either you accept that, or you don't.
Then there's the idea that we should allow euthanasia for severe mental illness. But how can someone consent to euthanasia if they're severely mentally ill? That makes zero sense. It violates pretty much every principle of informed consent.
Then there's this notion that dementia is the worst thing ever for the person with dementia, and that nothing could possibly be worse. Ridiculous. Clearly being cognitively intact and suffering physically and intractably is worse than being pleasantly confused in a nursing home. Dementia is horrible for carers. Dementia can be horrible for sufferers but it's not predetermined - it depends on the kind of dementia and what behavioural and psychological symptoms of dementia (bpsd) someone gets. Of course end stage dementia is pretty bad, because you can't do anything. Now having something like a rapidly progressive and untreatable neurological disorder or end stage liver disease or any other number of disorders is much much worse.