If something happens to you, or your partner, your mom, your children, your friends, on even your neighbors that you don't really care about but don't want them to struggle because it's nice to live in a society with healthy people around you.
but confronting cost without taxes is trite and tiresome. I'm going to pay north of 150k eur to subsidize healthcare thorough my life, and being in the upper tax brackets (which start at some ridiculously low point) I also have to copay each service on top of already being paying more taxes for it.
and when I see the "but ambulance rides are almost free here in x european country!" and the likes well no, they aren't, it's people that just didn't factor the actual costs in, because it's sunk in other taxes.