The MDeity effect is at least partly responsible for this. Once we start treating doctors like gods, we start expecting godlike performance from them -- and when they fail to deliver, we don't accept that they are just human beings, but instead blame them for not producing a miracle.

Then there is the whole thing of using the courts as slot machine, hoping to get the lawsuit payout so big you'll never have to work again, but that's a whole nother rant for another time.