If you want my serious view, then it's not about "sanctity of life" either but a holdout from Christian morality concerning God's "ownership" of human souls.Then there is your bizarre idea that Western societies' opposition to euthanasia is nothing to do with traditional ideas of the sanctity of life, but in fact is all about maximising productivity from citizens?
Clearly, Western liberalism minus this particular influence would demand that the 'agency' and 'true will' of the passively-suicidal individual must be upheld. From tolerance, it's a short leap to pragmatism: much better for society to administer death in a systematic manner than to have to deal with "public fallout", so to speak.
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