India is struggling with implementing solutions to issues that appear to be more-or-less solved for other countries; such as a working road network, public transport in most cities, picking up and distributing food harvests and a 24-hour supply of electricity. If a mission to Mars might provide fundamental insights into solving such issues, other countries seem not to have needed them.
Added later: I don't believe this mission to Mars has nothing to do with good old South Asian jingoism, and outdoing the geographical neighbour I shall not name.