That's part of it, but as an Asian American immigrant myself, the stereotypes aren't really far off. "Tiger parents" is an American characterization of how Asian families are generally structured: parents (who have knowledge and life experience) dictate to kids (who lack both). Dating and relationships are discouraged (freeing up huge bandwidth for studying) while marriage is expected (heading off the tendency for extended adolescence). "Hard working" is a byproduct of being not that far removed from subsistence agriculture. "Finding yourself" is discouraged. "Carrying out your role" is encouraged.

These are cultural adaptations to an environment that's very different from America. My dad grew up in a Bangladeshi village, where people who didn't work literally didn't eat, and the vocational choices for 99% of people were "subsistence farmer." I don't think the words "fair" or "unfair" were ever uttered in my house. (And it drives me nuts when my American-born kids say that.) In America, these cultural traits become positively adaptive, because most of the competition isn't trying as hard. It boggles my mind how many Americans don't study for the SATs, but do have iPhones.

My roommate in undergrad (State university) many decades ago was an Indian guy. The whole "asian work ethic" stereotype: Driven, hard working and brilliant. It dawned on me really early on that there were probably 20 million people his age in India and out of them all, he was one of the (relative) handful to pass all the gatekeepers and come study in the USA. Whereas I had a mediocre GPA and SAT score and basically out of laziness applied to my home State's university only and got in because of my address. Super early and instructive lesson on white (and American) privilege.

This happens in the US too though. We have about 10% as many people, so for undergrads, it’s really just ~ one more level of applicant filtering than we have in the US.