I'm wondering. Is it a good reason to start having kids because of dying/aging relatives?

For example in my case, 2 dearly loved grandparents are deceased. My remaining grandfather isn't doing very well at all. I'm their only grandchild that's married. I want them to have great-grandchildren, and want my children to have at least a picture of a great-grandparent. My mother has a picture of my great-grand-mother (my Italian ancestor) holding me as a baby. She died shortly after, maybe a few weeks after.. so it means the world to me and my mom that she got to hold me.