11 Driving is it? That means he's going to beat his defender and head for the hoop a bit (some more, some less, depending on your Offense).
So, let's say he gets inside 5 times a game. You've now wasted 5 Possesions, as that 1 just won't stand up.
If I have a guy with horrible IS, I pray he has horrible Driving also. Why? So he doesn't create MORE shots inside, where he can't shoot. Same with JS/JR. If the JS is horrible, I want the JR to be horrible... hoping if the JR is low enough he just won't shoot many 3's that he just won't hit.
I think his Driving is good enough to create more shots Inside (from driving off the perimeter). This will do three things. It will give him LESS Jump Shots, which he is good at. So you get less shots that he's actually good at. Maybe with a Drive of 1 he wouldn't look to drive... he might Force a few more Outside Shots but he probably has better odds hitting a forced OS than an IS where he's open.
The second thing it's going to do is make him take more IS, which he is atocious at. So now, more misses. Also, his Rebounding is pretty good... which means he might just get his own miss back... but then what will he do? Miss again?
Third thing is this. He has pretty good passing, which helps with Offensive Flow. If his Experience is low he may attempt to Drive (leading to another bad IS) when the better option is to Pass. So now you weaken his Passing Effectiveness.
That IS actually affects many things that this player would do so well, but now gets less chances to do. Each time he Drives could have been a good OS or PS that he would have made. Obviously, not only does that low IS hurt the player, it hurts your team overall.
Pretty much, once your have Driving at any decent level... he needs to be able to handle himself on IS. Maybe not be a beast, but be good enough that you don't get angry every time he drives.