Doctor! Doctor! It Hurts When I Do This…

So a man calls up a random doctor he’s never talked to before and says “Doctor, I have this mysterious rash breaking out on random parts of my body, what do you think it could be?”

And the doctor replies “Well, without examining you and running some tests, it would be very difficult to say.”

And the man immediately responds “I thought you were supposed to be a medical expert.”

Why do we expect a project manager to instantly diagnose all of the problems with a multi-million-dollar 2-yr old project experiencing certain difficulties after just a free five minute phone consultation?