IMO it's simple (and this is of course a common view): healthcare in the United States is a failed market. It's not about free market fundamentalism vs socialism, it's just that in this case, this market is totally broken. Costs are completely out of control, and accordingly, access, that is, access without incurring crippling debt, is a huge problem.
Obama tried to address both cost and access. He went up against the insurance companies, and lost. He got somewhere on access, but even that is just access to insurance; insurance that may leave you with thousands of dollars to pay out-of-pocket if you walk into the ED with a complaint. So maybe you don't go.
Socialized medicine, it seems, certainly won't fly in this country. But socialized insurance, "Medicare for all"? We, the little people, have many reasons to support a multi-decade experiment with that.
There's no ideology here. It's just insane (unless you're profiting!) given history for us to continue imagine that in this case the Invisible Hand is going to fix things.