I think there are advantages either way. I have three kids, born when I was 35-41; when my wife was 31-37. The children met great-grandparents, get lots of experience with their grandparents, and I think time for us to get more established has made for a stronger and more interesting parenting environment. I might've regretted giving up chances to travel/etc before having kids. That said, I am conscious that I would be 80+ before my youngest hit 40.
It might be that consecutive generations of late-parenting are where the impact is felt. My parents had their three children at 24-29.
On the other hand here I am today living half way around the world from where I was born, so maybe this urge to expand outward is some sort of genetic thing. Could explain a lot about humanity - Africa was pretty much a utopia especially relative to the damnable freezing wastelands the 'Northern Lands.' Gotta be something a bit wrong with some of us! Hey who's up for going to Mars? I am!
This [1] is RFK Jr at friggin 71 years old, amongst other athletic feats you can find videos of. He's on testosterone replacement therapy, but on the other hand I don't think that's really some big asterisk. Testosterone is absolutely critical for men and it declines as we age. When I reach the point where my testosterone has meaningfully diminished, I'll also likely do the same. And TRT alone doesn't give you results like that - that's the result of endless dedication to maintaining your health and fitness.
He's an eccentric man in a hyper-polarized world yet has raised 6 children that, at least publicly, have remained neutral to supportive of him. He's gotta be doing a lot right there IMO. And having a 70 year old father that's still in phenomenal shape and health is something our GP would certainly have liked to have had.
Why? Nobody knows. So the answer is most likely that we're doing what we've endlessly done countless times dating back to at least the era of the Roman Empire, and are accidentally poisoning ourselves with something (or some things) that we are convinced is completely safe. I'm not saying that Kennedy is right, but I am saying that "we" are wrong. And so walking down a different path on occasion is not only okay, but a very good idea.
[1] - https://www.popularmechanics.com/science/a43469569/american-...