> Biggest example is the idea that it's dominated by a culture of white tech bros, when in fact it's dominated by highly educated and hard-working Indian and Chinese immigrants.

Those are two related but also completely different things. Just because immigrants work at these companies doesn't mean they have a large impact on the overall culture, especially not the outward facing culture, and they certainly aren't dominating it. If anything those groups are underrepresented in culturally influential positions.