[reuser]

Evolution is systematic change in allele frequencies.

The combination of natural selection and sexual reproduction tends to produce organisms which "fit to" their environments (hence "fitness"). It does so reliably enough that it might as well be the goal.

"AI systems" are not like people and they don't need people to be around to work, they do not function on the basis of ongoing intelligence from people. If the people die and there is nobody around to care, the same mechanisms do what they always did according to the natural law of the universe. They are just mechanisms which get things done. And so is evolution. And it is irrelevant that no person designed evolution to be that way.