The media always picks up the Nuclear Weapon thing. However, India can take out Pakistan with just one conventional major air strike. Here is the logic.
Pakistan's economy depends on Karachi, a megacity of 15 million people, for just about everything going in and out of the country, and as the major economic and industrial centre.
Karachi's water comes via the Karachi Canal from the Indus, dammed by the Kotri barrage.
It takes 5 days for water to flow (by gravity) along the canal from the Indus to Karachi.
Take out the barrage and breach the canal and 5 days later 15 million people have no water.
I know about this as in 1991 I was on a water project there, and several hundred yards of the canal collapsed. We were shitting bricks for 4 days, until the Pakistan Construction Battalion rode to the rescue.
In the wars to date, India has always backed away from that action, as Pakistan would have only one effective riposte - the Nuclear Option. Of course, one day a hot head like Trump (with limited checks and balances in the system) might come to power, at which point all bets are off.