No it isn't. Everything between your physical condition and intelligence is largely tied to your genetics. Having a random assortment of dudes gangbang women makes much less sense than making superhumans to produce superior offspring. But even if you take that away, the preview images don't exactly convey a sense of efficient breeding program either, considering a dude's fucking a pregnant chick in one picture and presumably a dude is fucking 2 chicks at once. Hell, one dude's getting sucked off, and unless I failed biology, you can't get pregnant from swallowing semen.