Going from kids at 35 to kids at 23 sounds like a bridge too far to me. Your points about having kids later are fair enough, but kids at 23 basically means giving up any opportunity to have a life of your own as an adult. You're going from being a kid yourself directly to being a parent.
To each their own, but I doubt this would be a good idea for most people (or their kids). 28-32 range seems like a more reasonable compromise. Then you at least get your 20s (or most of them) to have some fun, figure yourself out, get your career going, have a failed relationship or two, etc. before taking on 1000% more responsibility and limiting yourself in many different ways.
Also, just speaking for myself personally, I'm 38 (with a 4 year old) and actually feel healthier and more energetic now than I did during my 20s due to taking diet, exercise, sleep, and other health/lifestyle things much more seriously. I don't know if I'll continue to feel this way into my 40s, but I guess my point is that age definitely isn't the only factor--I'm not even sure it's the most important.
Fair enough, and you're likely right that 23 is a bit too early. I'm writing this from a perspective of being 35, with a 4 year old and an almost-2 year old. It's fine now, and I too feel OK in terms of energy levels - but I also fear that, by the time the kids grow up enough for my wife and I to regain some degree of autonomy, neither of us will be strong enough to make good use of it. But maybe it's just me panicking a little.
To each their own, but I doubt this would be a good idea for most people (or their kids). 28-32 range seems like a more reasonable compromise. Then you at least get your 20s (or most of them) to have some fun, figure yourself out, get your career going, have a failed relationship or two, etc. before taking on 1000% more responsibility and limiting yourself in many different ways.
Also, just speaking for myself personally, I'm 38 (with a 4 year old) and actually feel healthier and more energetic now than I did during my 20s due to taking diet, exercise, sleep, and other health/lifestyle things much more seriously. I don't know if I'll continue to feel this way into my 40s, but I guess my point is that age definitely isn't the only factor--I'm not even sure it's the most important.