They "very promptly respond" to tiny whiffs of data when they suggest there is more money to be made (i.e. growing the pie of medical spending).

If the data suggest that a treatment in general use is in fact useless, they are blind.

https://www.theatlantic.com/health/archive/2017/02/when-evid...

https://mobile.nytimes.com/2016/08/04/upshot/the-right-to-kn...