You don't need the majority of your population in farming to feed your people. In developed countries basically no one does farming. Farmers are technologists who operate vast fleet of machines to do the bulk of the work for them and who think in systems, not the quaint image of a simple man and his plough

In other words in developed countries farming is mechanized in India it's not and until it's mechanized India is doomed to always be an agricultural pastoralist developing Nation