The danger is if you attempt to fly wings level with the ball centered, you may run out of aileron control.
The problem is that you are wings level when the engine failed. You don't attempt voluntary to fly like that after the engine failed. You are wings level because that is the attitude during takeoff. More than that, you get a roll when it fails, so in the best case you are wings level. So how to bank 5 degrees towards live engine to assume best attitude for Vmca if you don't have enough aileron authority?>
It seems like a vicious circle or like a trap.