There's a couple of things going on there.

First of all a HUGE selection bias wrt who would actually have gotten to migrate to the US; which is where I'm assuming you're from.

The second thing is that Eastern European cultures have WAY more focus on technical and theoretical/intellectual achievement. Whereas US culture is obsessed with finance and entrepreneurship, Eastern European culture is so with STEM and intellectual achievement.

Thirdly; stay away from racial stereotyping. It's almost always damaging, even when positive, and it's virtually always oversimplification due to an incomplete understanding of the culture and conditions of said race.