India, similar to Iran in TP1/2, faces a dilemma: What is the correct amount of Brahmos to launch?
A few missiles would easily be intercepted by Pakistan's AD network, especially around major cities, strategic areas and bases.
A massive salvo of 100+ missiles would likely lead to at least 10 or so slipping through Pakistan's AD network. It is also highly irresponsible to do this in a nuclear-armed environment, Pakistan might mistake it for a nuclear attack and launch its own nukes at India.
But even if such an attack occurs, then what?
Having depleted a large number of Pakistani interceptors and managing to hit some targets on Pakistani soil, India would be inviting a Pakistani response of a similar scale.
What Pakistani response could match the scale of the Indian missile salvo? Take the example of Israel's retaliatory strikes on Iranian S-300s and missile production facilities. PAF could similarly target Indian S-400 and Brahmos/Agni-P/Prithvi/Prahaar/Pralay production and storage sites.
Then there's the long term matter of the Indus Water Treaty. Would India quietly re-instate it, or risk billions building dams that will be bombed to smithereens by Pakistan anyway?