Generalising a bit, it seems to me that in Asia a lot of political leaders come from engineering, whereas in the US and Europe many come from the humanities, especially law.
The current prime minister was the son of a tea-seller, and not very highly educated.[2]
Who do most think is a better prime minister? The second. I believe faith in technocrats is misplaced, and wisdom does not equal technical competence.
Anyway, you raise a fair point with a solid counterexample.
http://www.dw.de/few-entrepreneurs-in-new-german-parliament/...
More than half are administrators (probably civil servants i think), teachers, lawyers.
So human politics is far more obviously powerful than science.
It's been a good-enough approximation for most of history, even though in practice it's completely wrong.
Politics is badly in need of a Copernican revolution which puts the physical world at the centre of politics, not the periphery.