You'll have an effective afterlife (kids) to fight off that existential dread, and you'll be too busy to be thinking such futile thoughts. It did for me, anyway.
Pfft. This describes your comment. The OP was asking for Internet advice. I gave mine. Disregard it, if you don't like it. Nobody has to blindly follow advice, if it doesn't make sense to them.
I don't know about you, but I've gotten countless bits of wisdom from the Internet.
I had 3 kids on the verge of turning 40 and I'm glad I did. I was more mature and had more wisdom. My career was established and stable. I was in a great position to have kids.
And, it's kept me younger. We have running competitions, weight lifting competitions, sports competitions. The days I could beat my kids at running are long gone. Now, one's about to beat me at weightlifting. It's really something beautiful about the human condition, watching your kids grow and slowly beat you at everything.
Raising kids is challenging at any age, but I can't think of a more perfect time in my life.
Eh, I'm in my 40s and have a baby. I don't have as much time and energy, but I have money so I can have a nanny. I get to eat lunch with my kids on WFH days, and I get to see him getting attention from someone who has tons of experience with babies and enjoys them.
You'll have an effective afterlife (kids) to fight off that existential dread, and you'll be too busy to be thinking such futile thoughts. It did for me, anyway.