Areh Dada who is saying we will actually use nukes?
https://en.m.wikipedia.org/wiki/Mutual_assured_destruction#:~:text=Mutually assured destruction (MAD) is,nuclear strike and second strike).
The basic idea is deterrence. Us and soviets only played proxy wars as there was fear of MAD, same here you might feel we will never use but do you really want to try? Put millions at risk of annihilation for a small area of land?
For the same reason China hasn't dared go into a major conflict only resorting to border skirmishes to show foreign policy, much superpower?
And that's just now, in the future China will not dare. Just check our SSBNs planned. We might even scrap our plans for a third aircraft carrier so that we can put same funds on our submarine fleet, both nuclear and conventional, this is to ensure just that.
https://en.m.wikipedia.org/wiki/List_of_submarines_of_the_Indian_Navy
Also don't forget our existing land and air based platforms. Agni 5 ICBMS(AGNI 6 comming up) comes to mind.
Check this -
https://en.m.wikipedia.org/wiki/India_and_weapons_of_mass_destruction
We are not fools to invest in such platforms aggressively mate.