> Did a doctor ever give you a guarantee that their treatment would heal you?

You don't get a guarantee that a brand of paint will work with your walls, but that does not mean paint doesn't work.

Meanwhile, personally I've enjoyed a 100% success rate in all medical treatments I was subjected to. I might be lucky, but I'm under the impression that everyone around me has been fantastically lucky as well.

Does this mean there are no conditions for which modern medicine does not have a good answer to? Absolutely. But it's my understanding that patients are indeed briefed on relative chances of success.