[imtringued]

Humans don't expire very quickly.

Most humans are going to outlast whatever they produced during their lives. If anything, human bodies are among the most durable "goods" in the economy. Only real estate, public infrastructure and recorded knowledge (including genes) last longer than a human lifetime. How many of the things you buy and own are going to outlast you?

[6510]

I was referring to the age distribution. If having a smaller percentage young people gave us an evolutionary edge it would have happened(?) Say the ratio rebellious exploration vs applied knowledge. What is ideal?

All the goods we produce are designed to last for a specific time. We can easily make them more durable and with some serious effort they could last longer than we can imagine. It would be expensive, it might be beneficial but who wants to pay for benefits 100 or 200 years into the future?