What is about "a vast, diverse population into something they are not"? Are you saying India can not be a middle-ish income country like China/Thailand/Malyasia etc. I would like to believe that wise choices by the electorate and good leaders and some luck can transform the country (or any country). Japan/South Korea/Thailand/Malaysia all did it. Some of those countries are vast, some diverse and some had less advantages than India.
If you believe in the opposite that then are you not giving into the ideas in the "Clash of Civilizations" or worse "Genetics as IQ" crowd?