If I may comment.... Machines are only as good as the people who design+build them. Creativity is not in the realm of computers, contrary to what Hollywood thinks.
I would agree with you, however, that computers are faster and more accurate than humans, and will respond to specific sets of inputs far more quickly. So, your argument is true, to a point. If the humans who designed computers, say, told it "In events 'a', 'b', and 'c' occur, your response will be thus" ... then, computers will beat humans nearly every time.
Where the wild card comes in, is when events 'a', 'b', 'c', and 'X' occur ... if the computer hasn't been programmed to respond to 'X'. Humans (most humans) can handle the wild card - judge whether it needs a response, measure what the response should be, and so forth. Computers can't do that, and I don't see it on the horizon, either.
'Tis the reason why things like computer-controlled driving (PopSci had a big article on it recently) and such scare the hell out of me. There's no way to control for all possible inputs, ergo, the system may be successful 99% of the time, but the failures in the other 1% will be spectacular. This is fine when the worst that can happen is a crunched fender while parallel parking....not so much at 70 mph on a computer-controlled freeway.
Very well put.