Look, I consider myself a conservative of a kind and Medicare for all, or a National Health Service/Welfare System seems to me to be part of the basis for a modern, civilised society.

It doesn't change other things, but it does bring health within the ægis of civil service/governmental departments, and that governance is therefore subject to voters, not shareholders. (I am making a distinction here which may not be obvious to everyone, even though you and others will assume this.) Structurally it assumes the health of the nation and its constituents are a vital part of the infrastructure of the nation. This is definitely true in wartime, why not in peacetime?