I really doubt that PhDs have any trouble immigrating legally to any developed country using the existing channels. I did it years ago with just a University degree and some work experience.
What I’m absolutely opposed to is uncontrolled immigration where anybody who feels like it comes to my country. In the same way that I don’t let strangers come to my home without my permission.
When my neighbor is suffering, I address that problem through means other than inviting them to my bedroom.