It's called chain migration and it's well known that you can go beyond just siblings, parents, and children:
> As a general rule, it is impossible to obtain U.S. green cards for one’s grandparents, aunts, uncles, nieces, nephews, and more extended relations – unless you can create a chain of relationships so that a more immediate family member can petition for them. For example, instead of petitioning for a grandparent, a U.S. citizen could petition for his or her parents; and they could, after receiving a green card and eventually U.S. citizenship, petition for their parents (your grandparents).
https://www.alllaw.com/articles/nolo/us-immigration/who-is-e...
The numbers fully support this too as I mentioned there are far more skilled workers with Visas and green cards vs family members/relatives in Canada than the US:
> Contrary to conventional thinking, it could be argued the U.S. system is more “compassionate” than Canada’s. Almost seven in 10 of those who settle lawfully in the U.S. are close relatives of previous immigrants. Each U.S. immigrant on average sponsors 3.5 family members.
> Canada, meanwhile, restricts “family reunification” immigrants to about one in five. Canada mostly picks immigrants to boost economic expansion. Two of three immigrants are brought in because of their skills and education. Trump’s plan, created by son-in-law Jared Kushner, copies Canada’s reasoning.
US = 70% family/relatives, Canada = 70% skilled workers
https://vancouversun.com/opinion/columnists/douglas-todd-wha...
Our immigrant communities are famously successful too. In large immigrant communities like Brampton outside of Toronto, Hindus often rank #1 in income per capita, beating out Christians, Jews, atheists, etc. The Chinese communities in Richmond Hill, Markham, and Mississauga are also very successful. You can't drive through those neighbourhoods without seeing Mercedes and Teslas parked everywhere.