"Rational People" don't discard two centuries of empirical Western medical science in favour of sticking their thumbs up people's butts to cure cancer, checking the colour of quadrant 2 of the left eyeball to identify a sore toe, and administering garlic enemas.....well, probably just for the hell of it.
Rational people, in fact, DO rule the world, they DO invent new things, and they DO succeed. Demonstrably so.
Compare and contrast: Tesla vs Gates. Which of the two can be considered more rational? Most would wager Gates.
Now, which of the two wound up as the world's richest man, and which one died in obscurity, despite being credited with the creation of everything from television to anti-grav devices?