Why won’t Kirby use a true duel threat Qb?

It’s the only thing stopping them from being truly almost unbeatable. I doubt it’s because he can’t get one. Surely it isn’t race since dj Shockley once played there and Quincy Carter. Just seems odd that Kirby of all people doesn’t realize you need an athletic QB to win it all. Or at least it would be helpful to them. Scrambling qb is the one thing smart and Saban couldn’t deal with