[Water Warrior 2]

Here is one reason for adding throttle in a curve. With the bike leaned over the bike will slow down a bit due to running on the edge of the tire which is a smaller overall diameter than the center of the tread. Exactly what you don't want to happen. You want to maintain or increase your speed to corner confidently and safely.
After you get good at that you can try leaning your body to the inside of the turn(turn right lean right)and see how much more the bike falls into the curve. Try it in baby steps though, the bike may surprise you with a real increase in cornering ability. My Vstrom scared the crap out of me when I was experimenting with shifting my body weight and position. My budget adventure bike is far more capable than I will ever be in the twisties. What the heck would I ever do with a real sport bike?