I often compare Natural Selection to Survivorship Bias, because as far as I can tell that is what it is.

There is no “drive” or mythical force to be better. A mutation occurs and the result works or doesn’t.

Those that work have survived until today, and those that don’t failed to reproduce sufficiently to reach today.

That said, today we actually have what I call “Un-natural Selection”, and that is when we humans take something that would have failed naturally and ensure its success through our intervention. Think seedless plants or humans/animals with chronic disabilities. Natural selection would likely have eliminated them for failure to function or reproduce, but through our will they endure. For now.