Because it sets baseline standards. Yes, I think everyone knows the US does not have the best healthcare in the world. But I also think it's 100% appropriate to

Because it sets baseline standards. Yes, I think everyone knows the US does not have the best healthcare in the world. But I also think it's 100% appropriate to say if you want to practice medicine in this country then you must meet our standards. Just like a drivers license might not be valid in any country you visit outside your own.