It's true that one of the advantages that Canada offers to new immigrants is our family class, with the provision that parents and grandparents can immigrate. It's a matter of doing that in an appropriate way.
I personally don't have a big problem with increasing the family class size a little bit, but there are limits to what we want to do in terms of costs that our society wishes to bear.
Personally, I think the diversity that immigration brings to our society, and that parents and grandparents bring to our society, merits those costs.