Surely after all you are supa power.
However do you know how hard to annex a country with a hostile population toward your country? Do you have slightest idea that if your country even try to stay longer by violating the order of Mujib to leave, what would happen?
That time no other country recognized Bangladesh other than your master Soviet? It would be proven that India annexed East Pakistan and the result would be withdrawal of support of your master Soviet. So yes maybe our independence should be fought long after your tried to annex us, with a doom of your indian union. Soviet wouldn't keep supporting you if you proved with your action that you want to annex East Pakistan instead of helping them liberate.
Thankfully your policy makers aren't the poor a.ss.hole like some of you, and that's why india is surviving as a country.
@The BrOkEn HeArT