Their brains are the same, what differs is the environment.

Humanity's superpower is the ability to copy and mirror each other very effectively. It does not require advanced awareness or intelligence to do it. Most people copy others subconsciously!

Majority of people won't contribute anything technologically, but they sure as hell can copy.

What is normal? You know how girls dress, let’s say in the Andes? Is that normal? Or by normal you mean what’s fashion in NY? Or perhaps what the majority of people wears today? Or what the majority of people have worn in the past?

Very little of what the west does can be considered normal.

> Can't let their underage harem girls dress normally

If you use a strict definition of normal, like practiced by a larger proportion of the world, then they are actually normal and we are WEIRD. If you add history into the mix then that type of dressing was common in basically the vast majority of cultures for the vast majority of history

Have you just discovered the concept that humans are all humans, and all our achievements are just a mountain of knowledge we stand upon, from first principles?

Humans are human, someone being born in Africa doesn't magically mean that they will never understand technology.