This is not even close to how medical science works. You really think surgeons, technicians, physical therapists etc. aren't scientists and engineers?
Yes, those surgeons in some sense are just mechanics/craftsmen, but what they do was research five years ago and they know they must stay up to date, so that they can do that Y by the time that new X has sufficiently developed. Also, many of them work on getting those new Xs to market, if only by helping in trials.