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Eugine_Nier comments on Feed the spinoff heuristic! - Less Wrong
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Tetlock's political judgment study was a test for macroeconomics, political science and history. Yet people with PhDs in these areas did no better on predicting macro political and economic events than those without any PhD. Maybe macro helps in producing good econometric models, but it doesn't help in making informal predictions. (Whereas one suspects that physics and chemistry would help in a test of quick predictions about a novel physical or chemical system, vs. people without a PhD in these fields).
Another analogy is that having a PhD in the relevant sciences doesn't help you play sports.
In some sports, applied science seems important to improving expert performance. The PhD knowledge is used to guide the sportsperson (who has exceptional physical abilities). Likewise, our skill at making reliably sturdy buildings has dramatically improved due to knowledge of physics and materials science. But the PhDs don't actually put the buildings up, they just tell the builders what to do.
I can't find the references now, but I have seen several stories about sports (specifically, some football teams in Australia) using psychology and other scientific knowledge (and improving because of it).