Your examples make no sense.
Americans are to poor to fly overseas to get healthcare they can not afford in their own country.
As I said before, only 'super rich' fly to the USA for treatments. And to be super rich or does not really matter how poor the country is you come from.
The rest of your post makes no sense either. In europe everything is centered around 'health care'. Foreigners flying to europe have by definition no 'health care' but need a private contract with the hospital or doctor they want to seek. Same as if they visit the USA. Why would one fly to Denmark for dental aid? Hu, every country on the world has good affordable dentists, facepalm! I fly to Thailand to fix my teeth, or I could fly to Greece or Tunesia. To combine a vacation with treatment for the same price it would cost me in germany. However: I have a private health insurrance. If
I had a tooth problem, they pay up to $4000 per year. As I take care of my teeth, they never have to pay anything.
The parents of an american friend of mine actually live close to Paris, they are from Camerun. They both get Hepatitis and cancer treatment
The story is quite funny, as she was with her parents she needed a routine operation. As she is from Camerun and her family has 'residentship status' she would be operated 'for free'. But as she was a director of an american mutual-funds bank, her health insurance insisted she flys back to the states. They refused to pay any followup treatments if anything would go wrong in the hospital in Paris.
So she got a first class flight and an operation in Washington that costed far over $10,000
The USA might have a few specialized institutions that are above European level (in terms of quallity of service), but most certainly not in numbers that are in any way relevant.
The first heart transplant was not done in the US
Hint: not in the USA
Answer: In my country