Why do we age? Human physiognomy evolved to grow all the right parts and be ready to reproduce as fast as conditions allow. Once everything is ready to go, we get an overwhelming shot of hormones to compel reproduction.
But there is a new factor in evolution; survival. We used to not survive very long past growing a child to self-reliance and had to make kids fast before something inevitably killed us. But then we had to go and build shit and figure out fire, electricity, atoms. So now, after the hormone boost we used to need, and the kids have matured and left the roost… well, the purpose is gone but we’re still here. Do we just default to being the grand parents? Taking care of successive generations of the progeny and “enjoying life”?
I’d like to focus on shaping the whole of humanity. Of course I would enjoy life as well, we invented cake and cookies and good beer for a reason.