Does anyone actually know how to cook?

I recently checked through a few videos on youtube from some top chefs to see how they are roasting their chickens as I had bought a nice corn fed free range bird and I didn't find what I expected to find.

There are often many ways to get to a similar place with things at a moderate level of performance but my understand is that at the top levels of competition, when people really know what they are doing, when what they are doing is optimal, they are ALL doing the same thing, or trying to, the winner is whoever can execute the optimal path most accurately.

So when I get a different answer from 3 or 4 top chefs about how to do the same thing I can't help but conclude that no one knows what they are doing.

Whatever optimal is does not seem to have been identified.

Does anyone actually know how to cook?
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