It's because in the leftist bay area tech scene, of which ycombinator is the absolute epicenter, no one does bias training. Among leftists, indians are the "model minority" and everyone is looking for an indian golden boy. You have no idea you are even doing it because you have implicit bias you are always crowing about. India is one of the poorest nations on earth and has many smart people, but there is an infatuation among the monied west coast left.
In a way the leftist tech scene has adopted eastern mysticism and shows how far california has moved from westernism. Hindu and Buddhism are religions that worship living humans and believe in divine incarnation. A young person might be a llama in hinduism or a tulku in buddhism. It's not to say that these tech startups are worshiping their newly discovered india programmer, but it is the culture that does not fall far from the tree.