Healthcare is a particularly _atypical_ example to choose, and the particularly poor health outcomes of MS are only partly explicable by healthcare cost/access: it's also cultural and lifestyle issues. So it's rather disingenuous to say "take health insurance", as though it can be used by analogy to comprehensively explain other aspects of American finance.
You don't need recourse to GDP, you can just look at household income which really is higher. Most things do _not_ actually have inflated prices relative to European countries.
Would I rather live in Mississippi than France? Are Mississipians living better lives than French people? I mean it depends on where specifically, but almost certainly no. Of course having more money doesn't necessarily make a place better to live in.
But that doesn't invalidate "people have more money available to spend on cars and easier access to credit to finance that purchase over five years at favorable interest rates" as part of the reason why Americans choose to spend more money on cars.
You really don't have to take every point of discussion of difference between the US and European countries as an obligation to rant about how much better Europe is on tangential topics.