The good thing about KD and Klay is that they are not late in their careers right now, they are still pretty young compared to some of the other big injuries like theirs and that is why there is a chance they can find a way to recover with time
In a way, Kahwi made a good example of how serious injuries should be treated. They should follow his advise, "come back when you feel healthy". Kahwi has been ridiculed before and look where he is now after taking full time to recover.