I think you have mixed up physically being with your parents and caring for them.I have regard for my mother which is why I am always exploring options to bring her here permanently, and you said in your comments that your parents left your grandparents knowing the fact that they wouldn't be able to reunite again and they accepted it,this statement of your shows how much they care for them, anyways like I said before I am not here to argue with anyone,and if you are so anti-immigrant what are you doing in an immigration forum?go get a life somewhere else....
You can still care and love someone but not physically be there with them.
e.g. if parents hate Canada and love to be with their friends in home country, as a caring child, one won't push them to stay in Canada with the child.
Every family is different. Not everyone express their love and care the same way.
I support immigration since I, myself, is an immigrant. BUT the decision does involve leaving home country and extended family. And that WAS the decision made back then when the application was sent to IRCC.