He had less fumbles the less touches he had. Most of the fumbles were happening when used more. Proof is in the pudding my friend. That was also when he had his INT spike. More proof that as a starting QB, his negative stats outweighs the positive.
Who cares? We don't use him as a starting QB, so it doesn't matter if he sucks as one or not, we're not using him like that. I bet Kamara sucks as a QB too, but we won't use him as one, so it doesn't matter.