It simply isn't because of the cost of care is not appropriately distributed. Much of the population can't actually afford the wonderful care you espouse, and if you read down you'll see the US isn't necessarily actually better. More screenings and more diagnostic tests don't necessarily lead to better outcomes -- prostate tests are a great example of this -- but do increase the 5-year survival rates (in that the front end is extended but the back end isn't). What they don't do, though, is increase the cure rates.

In no small part because patients are being "sold" medicine, testing and treatments, and are profited off of. Similarly, doctors are getting sued senselessly. The lawsuits aren't just a nuisance, they're part of the reason these unnecessary tests are carried out in many cases; not doing so would create a liability.

I mean, OP got hit with $40,000 in bills with insurance -- you can't look at me with a straight face and call that world-class.

That's a deep and utter failure of society for allowing this to happen.