The right hand english was to carry the cue ball around naturally 3 rails to the center of the table to shoot the 3 in the side. Needed english because he had to play the location of the three with the speed of the hit and still get the cue ball around 3 rails to shoot it in the side. If he wanted to throw it more he could have just hit more to the left side of the 3 and still made the 6 ball, but the cue ball would not have traveled far enough and the 3 might have stuck on the side rail. He was attempting to control the location of the 3, and get the cue ball around to have position.