The things always missing from these arguments is the non quantifiable issues like “quality of care”.
It easy to get by paying half the US costs when you rely on the US to be the engine of health care innovation and development.
It also easy to produce cut rate medial costs if you willing to accept less then stellar medical care.
there is a reason the wealthy from around the world come to the USA for care rather then go to their local Government manged health care system.
American’s subsidize big pharma - the rest of the world tells them to halve the price otherwise they’ll allow generic copies.
And availability - many up in Canada wait many months for a procedure we can get next week.