> Organisms are evolved to utilise short life-spans to quickly adapt changing environmental conditions

They don't utilize short life span, but rapid replication

For many organisms short life span is simply a byproduct of their biology, but take an immortal mosquito and its rapidly evolving offspring will adapt as well as the immortal father did.

Of course immortal mosquitos would never be possible because the equilibrium would collapse if too many mosquitos are alive in a limited resources pool

But humans are not mosquitos