This attitude works right up until the kids want to start their own families... Then they realize they can't possibly live near the grandparents and having one

This attitude works right up until the kids want to start their own families... Then they realize they can't possibly live near the grandparents and having one home worth $1.5m doesn't do anything to help you buy two unless you're already making or have a lot of money. You can see this split hitting out in sunset, as former NIMBYs flip toward pro-housing as their kids return from college.