To start with your typical Indian couple in the US probably have a cross-caste, or even mixed-religion marriage. Back home is really tough on those folks.
Still, virtually every Indian in America was not allowed into the kitchen by his or her mother, or into the shop by his or her father. Their families made incredible sacrifices so they could become educated people and live a better life than their ancestors.
One of my Indian friends always reminds folks that "Indian people will work anywhere", which is true. Not that all Indians will do so, but odds are good that you can readily find one who will ~ for example, in the pathology lab. Check out that crowd sometime.
I live in the area of NJ where the typical Indian domicile ranges from a McMansion to a near-palace. (Okay, I know some who live in townhouses and ordinary houses, and some of them are conscious of their relatively low status.) But the Indians I know come from professional college-educated families, often for several generations, and not from shop-owners.