Sleekit said:
you exist to propagate your genes.
eventually it WILL get to you.
the fact we can think and reason doesn't disengage our basic fundamental drives as life forms.
all those things you might think are more important like making money, having "a career" etc, etc. you consider those things important because way down deep in the middle of your brain there's a bit of you going "these things will better ensure the success of your progeny".
I see that argument all the time.
I come from a ridiculously stereotypical Italian-American family (hardcore Catholic, my dad has 15 brothers and sisters all from the same parents, etc.). I have no intention of ever having kids. Not only does this lead to me taking constant flak from my extended family, but I also get constantly barraged with the very same claim you're trying to make.
This is despite the fact that even within my own family I have aunts and uncles who got married but never had children (because they didn't want them, not because they couldn't have them) who are living quite happily and are much older than myself. Hell, most of the time at big family get-togethers, those particular aunts and uncles seem to be the ones most enjoying life.
Every time the claim you made in that post comes up in conversation, those aunts and uncles just laugh it off. Frankly, I find it to be little more than people trying to justify their own life choices whenever someone else disagrees with them, in order to validate their own decisions as the "right" choice. It removes any doubt about whether or not thing maybe would have been better if they'd done things differently. When in reality, the "right" choice is subjective and not nearly so simple.
If the "biological clock" theory actually held any water, you wouldn't see population declines like what's being seen in Russia. If the "biological clock" theory actually held up, you'd see far fewer 'bachelors/bachelorettes for life.' Do
some people feel compelled to have children? Sure. But everyone? That's pretty laughable.