[ivewonyoung]

Those factors apply to non Americans wanting to move to the US but it's apparent that there is heavy demand to the extent of millions taking dangerous trips and breaking laws just to get a foot into the USA. You cant find such latent demand to the same extent via surveys or visa applications in the other direction.

[autoexec]

Those factors apply to everyone. Even, as I pointed out, within America itself. There are Americans living in places that are literally killing them. They aren't happy about, but they also can't just leave either. Learn about them and their lives if you really want to understand why.