Why do some IIT graduates work in Google and Facebook, thousands of miles away from everyone they know?
Why do some IIT graduates start companies that deliver food to people?
Why do some IIT graduate work for taxi companies?
I am guessing money. So, what is wrong with people teaching students (tuition teachers) for money?
Although, I believe that teachers should not work for money. Teachers should strictly work on donation basis with each student giving whatever they feel like. But, that is not the reality today.
Coming back to your original question, I don’t understand why are you so condescending to IIT graduates who teach tuition. Which is better: Working for a dating website or teaching students? Even when both are done for money.