I always do.
I wouldn't compare a commodity like a car with health care. If the federal highway system operated that way, nobody would be able to get to Montana. There are some things that should be basic infrastructure to support a society. Arguably I believe health care should be one of those for a multitude of reasons.
At one level, health insurance works best when everyone can be insured... just as society is at risk when a large proportion of the population does not get basic vaccinations: both the insured and uninsured suffer. At another level, we are already paying for the uninsured given that only 1 in 7 who come to trauma care have insurance. So that one has to pay at least 7x the true market price just to keep public services like trauma care solvent.
For another we are paying massively for a Byzantine insurance system of people whose job is to pass the buck and do nothing productive for their salaries. These jobs and roles should be eliminated. Just because they belong to private industry, for purely artificial reasons of government policy, doesn't mean they should be preserved while everyone is clamoring to eliminate government jobs on the other hand.
For another still, state and federal medical grants to research certain types of cancer and diseases and not others is a clear expression of health care favoritism towards one group's affliction but not another's. We are consciously making government decisions today to increase the lifespan of some groups of citizens and not others with public money regardless of whether they are insured or not. That is far from an equitable system.
And pharmaceutical companies cannot afford to invest in as many drugs as possible. The general cost of taking one drug to market is
over $2.5 billion now.