He's driven tons of times this season only to get blocked or otherwise turn it over. I'm not opposed to smaller guards taking it all the way to the rim, but he doesn't have the skills at this point to finish well.
only way to learn is to do it. also, you're exaggerating his lack of ability to finish. he finishes ok, not great, but ok.
Actually, I'm not exaggerating. He doesn't finish well around the rim unless he's wide open, sans the BU game ending.
I'm not opposed to him trying now and again, but he can learn in practice with our guys clubbing him, but there's no real defense to the times when he could pull up 7-8 feet from the basket and knock down an easy jumper like Irving has learned to do, or a tear drop like Sprads. The thing is, he has no other weapons in his arsenal right now, if he's driving, he's driving all the way to the rim 95% of the time.