“If they don’t need us then why do they come?”
Your question makes no sense. You’re suggesting Indians coming to America must mean India should need Americans to go to India. The two ideas are unrelated. We “need” cheap Mexican laborers. Mexico does not need lazy, expensive American workers. What part of that do you not understand?
My point was that if Indians have such a great entrepreneurial spirit, are better educated, and less lazy than people in the US then they should be the ones with the thriving tech industry and the US would be full of people wanting to go there.