Earlier quoted context omitted.
Your ideal immigrants are young parents with healthy children, who are apparently willing to abandon their own parents? And somehow this is a good thing?
Abandon is the wrong word. Should the country receiving the immigrants let elderly grandparents be cared for by their own country's pension and aged-care and healthcare industry, instead of burdening the receiving countries? Absolutely unequivocally yes. The grandparents can always come visit on tourist visas and the immigrants can visit their original country too.
I seem to recall the notion that elderly people are normally isolated, atomized wards of the “aged-care industry” as a relatively recent innovation, no? Versus people seeking to bring elderly relatives to reproduce the sort of multigenerational households that more traditionally handled aging care, and that do that today in other parts of the world?