The part that puzzles me most is the way you admit the existence of "chance destruction" before claiming "those who strive will extend their will into the future". In the real world, looks like 5.5 million children die annually between the ages of 4 weeks and 5 years. I picked that range because I'd expect many of them to try forming models of the world and optimizing it as best they can, before the world unceremoniously deletes them.