Only those not Geometrically Challenged, it would seem.
Dale
Funny thing about geometry is that it doesn't have much in the way of wiggle room. Geometric methods of aiming are perfect on paper but not always easy to estimate, guess, or even measure accurately. And even being a little off with the estimation means missing the shot for a lot of players.
I have tried this method and I personally can't do it consistently. I see the merit in it but for me it's not resonating.
John - geometrically challenged. I wouldn't know 90 degrees if someone walked face first into my shoulder.