Somebody in the process makes extreme margins.
Also americans cant be at same time avoiding going to hospital because of costs and “still get far more services than most of their counterparts in other countries”
Believe it or not there are countries where there is mandatory health insurance (your employer or you or state have to pay it) and doctors dont look at costs because they dont really know them. They for sure try to not be wasteful but nobody is second guessing obviously best treatment because it costs 40% more.