There's a bifurcation in US healthcare, which is pretty well known
on the one hand, it's a great system if you have top notch insurance and live in a good state for healthcare (looking at you, blue states). On the other hand, well...sucks to be you if you're in the other category I guess.
If I needed major exotic medical care, I would absolutely pick the US: if you want top notch neuro, cardio, oncology, whatever, the US is right up there. The problem is that only helps a small fraction of people
the union of people who have these conditions, and people who can afford the care.