What the point of creating the new mankind who don't have intelligent and just know how to eat, sleep and reproduce like an animal. This AI logic is kind of twist. Just imagine if those Hiruko are the one that last on this world, then what next. They will be no difference with dinosaur era, a punch of animals that just trying to survive and evolve again and again.
Yes, Human maybe mean to be extinted somedays that why we try to evolve and create a new human which is stronger, smarter, more generous. We wish for everyone can live harmony with other species and nature. We wish to understand this world and the reason for our existent.