By the way I know several people from lower castes who are super intelligent. And forced hereditary occupations are a thing of the past EVERYWHERE. Even in Bihar, our most backward state, you can't FORCE someone from the lower cast to stick to a profession (which is why Lalu Prasad Yadav, our railway minister and his party came to power, by fighting for Dalits, or at least claiming to).
Make no mistake, the caste system is very prevalent but you don't need to exaggerate to make your point.