The thrust that most of you talk about here is the After Burner thrust, but bigger aircrafts don't have an AB and just use dry thrust, but Kaveri don't produce anywhere close the thrust that would be needed
Also, India don't need bombers because they wouldn't be useful against the 2 main opponents. Pakistans size and distance makes most targets in reach of even our ground launched cruise missiles, while the main Chinese targets are at their eastern sector and any bomber would be easily intercepted way earlier. That's why SSGNs, SSBNs, more capable carriers and long range balistic missiles are beeing developed, just with deterrence against China in mind!