Age is also best avoided as it is the number one cause of bodily deterioration, disease and death.

Perhaps, but as death almost certainly assures a sperm count of zero (and some weird looks if you try collecting a sample), aging is probably preferable if you're trying to reproduce.

Dammit, I wish I knew that before I started aging!

"Avoid waiting (delaying) key life things you know you want" is actually great advice that even very smart people seem to fail to consider.

We (38) had our first child this year, and if there's one thing I wish I had done, it's had kids earlier. Probably in my late 20s. We didn't have any complications during pregnancy but it would have given me 10 more years to see my boy grow and would be physically easier on my wife.

Financially it would have been more difficult, but by no means impossible. On the other hand, I probably wouldn't have taken the opportunity for a complete career change, which would have made me miserable.

So if you hit professional/romantic stability in your 20s, I'd strongly encourage you to have kids as soon as possible.

Yes. In terms of best outcomes, you should have kids in your early 20s. Gametes are at their best, mother's body is young but fully developed and has the best chance at carrying the pregnancy to term without complications.

Financially, or in terms of career and other life goals, are other matters.

Technically, you can easily avoid age :)

Oh that went dark really fast lol