Sometimes it's not, or not just, the son or daughter who is a bad planner. It might be the parents.
My husband is a stay-at-home type. So are his parents. Also, I'm not prepared to play social secretary there--if a friend or relative calls, I will pass information along or hand him the phone. If someone invites us both, I will talk to him and then get back to them with a yes, no, or sometimes "I'd love to but he's not available" (if he's interested and I'm not, he'll be the one to reply). But it's not my job to pick up the phone and call his parents.
Meanwhile, my mother and I are both more willing to travel. The result of this is that we see his parents, who live in the same state as we do, less often than we see my mother, who lives on the other side of the Atlantic. Most often, that's while my mother is visiting our home city.
Fortunately, nobody seems upset about this; but if his parents did call me and say "Hey, we never see you" I would have my husband call them back.