Yes, rich people can put their children through test prep courses. However, the differential impact is much less than what they can do with grades or even worse, extra-curriculars.
A bright, economically disadvantaged teen can do very well on a standardized test. That same teen has no way of doing an impressive non-profit over the summer in another country, as many wealthier Ivy League applicants do.
The answer is probably complicated. I'd guess that India pushing tech in their education system is one factor. Indians and Asians are also a numerous and growing cohort, whose families are immigrating from higher populated regions. Their families may also encourage their children to go into tech. And the racist stereotypes these populations face are likely very different than others, such as African Americans.
It's that if you are Indian, you will not be allowed into the US unless you have a bachelor's in something leading into some high paying occupation. In fact, your odds are pretty bad unless you have a master's from an American university.
For Indian and Asian Americans, “their country” is the USA, and especially for Asian Americans, it's not uncommon that was true of their ancestors for several generations.
A large majority of Asian Americans are foreign born. The only groups that aren’t majority foreign born are the Japanese and Hmong.
https://www.pewresearch.org/fact-tank/2019/05/22/key-facts-a...
This is absolutely not true for "majority." A significant minority of them, this is probably true about, but a cursory review of how Chinese-Americans arrived to this country will probably dispel this rumor fairly quickly.
https://www.pewsocialtrends.org/fact-sheet/asian-americans-c...
Because for Indians and other Asians, doing well in tech is one of the main ways of becoming Americans. If we kicked out all the current black people and then had employment-based immigrant and dual-intent visas as the main route for blacks to enter the country and start the road to citizenship, then once there were Black Americans again, they'd seem like a pretty darn successful demographic.
4% hold a doctorate, 17% a Master’s, 37% a Bachelor’s.
https://www.nairaland.com/5968663/nigerians-top-most-educate...
All career paths is probably a bit of a strawman. I doubt you'll find anyone here who expects same number of men and women in every job. The more dangerous ones will always be disproportionately picked by men and that's ok.