If it was the best healthcare in the world, we’d have the best outcomes and we don’t even have that for rich people. We have a (non-metric) shit ton of world class research universities and highly respected agencies like the FDA and NHS but Elon Musk, the richest man in the world, can’t even get the mental health services he obviously needs.
I’d obviously rather go to an American hospital than a hospital in most of the world but spending a lot to cover up a shitty system isn’t as good as a functioning system.