Americans are relatively wealthy and hence choose to spend more on healthcare. That’s not surprising to me.
(Even beyond that, bizarre idea. “Oh, I think I’ll go for a _designer_ MRI scanner” said no-one ever; by and large, the expensive bits of health care don’t have a lot of choice involved.)
We did vote for Obama who gave us the ACA. And a number of states have banned surprise billing from out-of-network doctors. And hospitals are now required to post prices, but they ignore that
So there has been change in the last 20 years, but clearly we're spending more than ever.