In this case it’s arguably one of those “well, it’s worth it” scenarios because there is evidence that the expensive version is better than the cheap version (though arguably perhaps not better enough to justify the cost).
The situation gets turned on it’s head when it’s an experimental procedure, though. “Insurance wouldn’t pay for x because it was experimental!” is an all too frequent complaint (it’s even the entire catalyst for the show Leverage).
Well, why do you think they don’t pay for it? Not only is it always insanely expensive, but it’s also got a 40% chance of success according to the doctor who wants to perform it (who is incentivized to keep his stats up) and it’s not endorsed by anyone... and that is a huge liability.
So I suppose my point here is that, for the armchair physicians online, every chance there is to save $1k there’s a chance to spend $100k. If you remove regulation you’re not just accomplishing savings on one thing, you’re opening up a pandora’s box of expense on another.