Competition in the US Health System certainly doesn't do a good enough job at driving costs down...
I don't like to use these strong words, but I do find it dangerous and reckless when people with nearly no medical knowledge want to reason against proven methods on the basis of costs and the hatred of "evil, profit seeking companies".
If mistakes were made it's up to the medical establishment to judge about and avoid them in the future. Anticapitalists should not play a role in that.