I can answer one aspect of your question really quickly: whether or not most pros play a draw?
Well, I played the tours in America and Europe, "most" of the players did play a draw as their preferred shot which is different to their natural shot. Another problem with watching touring professionals is they can play any shot, any time and make it look as natural as breathing so it's really tough to know whether that's their natural shot shape or not!
In Spain in 2002, I sat and watched Jose Maria Olazabal (my golfing icon!) practicing and his natural shot is a draw. But he striped every shot exactly where he wanted it to go, from a gentle draw to a strong fade!
In early 2003, I watched Greg Norman (also a natural drawer) practice at a facility in Miami. The "caddy" who was picking up the golf balls stood with a baseball glove wherever Greg wanted him to stand. The caddy didn't move, all he had to do was stretch his arm out and catch the ball as it rolled or bounced past him! On the draw or fade side of the target ... That was seriously scary ...