Genetics, man. Genetics has screwed us over. Look at Bond, Southee, Boult, Wagner, McClenaghan, etc. How many Indian people do you know who look like that?
i dont buy that genetics story ,there lot of physically fit and real strong indians especially who are both mentally and physically balanced with good awareness of their body,,,if it was just brute strength or physique a lot of people are there and it is something that can be cultivated...i dont think you need to be super strong to be fast good examples would steyn,lee, and the opposite would be pollard .....
and even if the builds like southee or boult is required im pretty sure there are people ... i think its more about lack of nurturing talent who are young ,most of our bowlers esp pace are mostly rejects i guess who couldnt do well as batsman ,the whole mentality is even though parents now support kids taking cricket unlike in 90's ,they still want their kid to be the next srt .im yet to see parents encouraging kids to be bowlers here .. lack of proper coaching centre for those who cant afford,there is a lot of dry talent on the streets..
even coaches are mostly batsman oriented ,most of them dont have enough practical knowledge on pace bowling...im talking about the junior level here, ofcourse once you break to upper strata there;s mrf pace foundation with the best coaches ,but by then the young legs have been soldered and not much can be done after that...