Makes me feel better in a way. By age 60 it won’t matter much whether I had kids or not. Time spent with them per day equals, like, one TV episode. So I’m happy to see that my partner and my self will continue to be more important by that metric.
Why do anything in life at all? We're all going to die anyway!
Money can be exchanged for goods and services
Presumably a parent of adult kids would retort that it's not just about the N hours of face to face, but also being proud of each milestone they hit (graduation, job, kids, etc), talking about the kids with their partner, and thinking about them.