Molière said this quote

A shoemaker, in making a pair of shoes, cannot spoil a scrap of leather without having to bear the loss; but in our business we may spoil a man without its costing us a farthing. The blunders are never put down to us, and it is always the fault of the fellow who dies. The best of this profession is, that there is the greatest honesty and discretion among the dead; for you never find them complain of the physician who has killed them.