This is bad advice. A natural forward rolling 12 o'clock center high cue ball is theeeeeeeeeeeeeee easiest shot to control in this situation period. Drawing this shot to shape has Many more variables taking place during execution, and because of this the CUEBALL is more difficult to control. If you don't believe me. Shoot it 20 times each way, your answer will lie with your results. I know I could get the correct shape on the two to the 3 EVERY time with a rolling cue ball, and when I mean shape, I mean the easy/simple/natural angle from the two to the three. I of course could draw and get shape on the 2 every time, but I Know I would come up with bad angles from the two to the three often. Your also bringing into play the cue ball spin off the bottom cushion from the cue ball, that is NEVER 100% controllable.
One basic item on this shot is this. Your looking forward to shoot the one ball in the upper pocket, and your also seeing where the two ball is at during shot execution. This gives you allot more position feedback because your also able to see the two ball, a simple but very important principle to incorporate into your game plan.