Physique, height, athleticism. All these factors play a huge role guys. I bet Hamid could wrestle about 4 of our guys-he seems that strong. Afghanistan will produce more of such bowlers than we ever will because of this reason.
We have a better chance making a 90 mph fast bowler by bringing an Afghan, Paki, Aussie non cricketer and training them, rather than nurturing one of our own. Its sad but true. Not saying we should do, but making a point. Since we cant produce such quicks, we should try to focus on skill and accuracy. Even that we are not!
A nice example for my point would be Dirk Nannes. The guy played his first real game at 29. Because of sheer pace and bounce he broke into the Aussie, Dutch and IPL teams.