I wish it was that easy. Sadly it takes decades of consistent inbreeding to fuck you over, and the Clans for all their faults are very good about weeding about genetic illnesses out of their warriors for what are very obvious reasons of every Trueborn being massively inbred as a result of using only Bloodnamed DNA for the next breeding cycle of cannon fodder. The Warrior Caste is one giant genetic bottleneck kept (mostly) intact by the efforts of the Scientists.
And I may just be horribly sleep-deprived, but now that I've actually put it in writing like that, the Scientists going "Fuck this shit, we're in charge" with the Society makes a whole lot of sense...