I'm just going to have to guess that you aren't very old. I'm only 47, but I have to tell you that at least for me life just keeps getting better every year. I wouldn't trade this year for another year of my teens. I wouldn't trade this year for 10 more years in my teens.
Gradually losing health is unfortunate. I have to watch what I eat and be careful with my lifestyle due to chronic illness. My vision has degraded pretty badly and I'm forced to use a really gigantic font when I'm programming (you don't want to know how much time I spend fiddling with my colours!). These things pale in comparison to simply knowing what makes me happy.
I've worked hard to learn to be happy. Again, at least for me, I don't think happiness is something that is given to you. It's something that you make yourself. I suppose some people have a talent for it, like everything else, but it's something that you can work on and get better at. Without trying to sound arrogant there is no way that a child can have the kind of happiness that I have every day, because they simply do not have the experience to do it. They have a tumble of conflicting emotions which they have no control over. You couldn't pay me to do that again.
This. I enjoyed my childhood, and I wouldn't trade it for anything, but adulthood is so much more fun in a hundred different ways. If yours isn't, consider what it would take to fix that.
(If possible. I realize that isn't an option for everyone, and some people are working as hard as they can just to reach a secure position in life where they don't have to worry about basic needs. But this applies for those groups as well: if you had a thousand extra years to work with, as a start, you'd have a lot more time to enjoy the secure lifestyle you've worked so hard for, not just to pass that more secure position on to your children.)
I'm 31, with a toddler. I can't compare anything I do with the joy she gets out of the most mundane things. The first time she tasted chocolate? Blows me going to Alinea out of the water.
I'm not trying to disagree with you, I have a 7 month old son, but what about the joy you felt seeing her being born? I know that isn't a mundane thing and that you likely won't have it but a few more times but there are experiences that children can't have, that are, at least, as transcendent as a child's first taste of chocolate.
But that's precisely the thing. In a stable population, births per year are inversely proportional to life expectancy. So whatever joy seeing a child born brings to people, there will necessarily be less of that per year aggregated over the whole society. A society where everyone lives longer is necessarily one with a smaller proportion of joyful idealistic children and a higher percentage of cynical jaded older people.
Gradually losing health is unfortunate. I have to watch what I eat and be careful with my lifestyle due to chronic illness. My vision has degraded pretty badly and I'm forced to use a really gigantic font when I'm programming (you don't want to know how much time I spend fiddling with my colours!). These things pale in comparison to simply knowing what makes me happy.
I've worked hard to learn to be happy. Again, at least for me, I don't think happiness is something that is given to you. It's something that you make yourself. I suppose some people have a talent for it, like everything else, but it's something that you can work on and get better at. Without trying to sound arrogant there is no way that a child can have the kind of happiness that I have every day, because they simply do not have the experience to do it. They have a tumble of conflicting emotions which they have no control over. You couldn't pay me to do that again.