I find it a much more conscious choice for high paid immigrants. They can either live closely with their family, with the added bonus they basically live like a 'king' or they can move countries to live relatively wealthy lives in a new country.
Living in the US has many advantages but I feel like a lot of them matter more for offspring. More safety besides wealthy pockets in their home country and a more 'average' life experience compared to the rest of your country are things some people care about. Difference in air quality, traffic congestion and easier access to nature are things that make the US a more attractive choice.
But with changing politics I imagine even many of these advantages are less certain. Lots more things to think about as a (potential) immigrant.
> But with changing politics I imagine even many of these advantages are less certain
That plays some part but in most conversations I've had with Indian and Chinese nationals, the bigger issue for them was that it would take them decades to naturalize in the US. It's not worth spending your entire career and starting a family at the mercy of an employer.
As a con though, specially for Latin Americans, is the lack of family support, which is a big thing back in your own country.
So it's not all roses, it's one of my wife's main concerns about having kids, the lack of family support and them growing away from family.