I'm at the age where 30 years may well be the rest of my life (even assuming a fairly normal old-age sort of death) and 50 almost certainly is, so while I do care about what happens after for my kids, they'll also be quite old by then, so "the whole rest of your life during which you're still significantly active, plus all of your kids' lives up to as late as late-middle-age, by which time they're firmly set on their life courses and family planning and such, will suck" is... pretty bad.