You mean if india started doing their own research? Well of course, we the general population would benefit. Nobody is stopping them. Except maybe cost.
Beyond that, humans aren't all equal. Drug trials in the US make an effort to represent the general US demographics within their studies (which is also representative of Europe). Clinical trials of a 100% Indian population have questionable relevance any other country, and will likely require the entire study to be redone with a population-representative sample.