Not Pakistan, I have clarified in my that post itself that its nothing to do with Pakistan please try to understand.
Its about China.
If we block the trade of china with the whole world through land and sea the Whole china will be cut off and we gets a good bargaining power or deterrence so that China don't dare to bully us.
Really ??? The trade China does through Pakistan is hardly an amount which can make them come to the negotiating table. Its peanuts for them for the time being, yeah when KKH gets enlarged, Gwadar port becomes fully operational, the infrastructure is developed and China starts using this route for trading, then we can say it is an important route, but for now, it has no strategic value for China, rather its importance is in context of Pak-China.
And as for Sea Lanes, India needs a lot of time and naval strength to even harass the Chinese ships, Chinese naval forces are much in numbers and quality wise also very good, and they are inducting ships at very fast pace and their quality improved to great length.
So unfortunately, for now India can't do anything, except for off course dreaming as said before. Getting China's neck is very far away, if India does that, do remember, China won't hesitate going at full war, that includes land war also. Which India is not yet ready for.
And yeah China would not be cut off, it has other sea routes available also, though they would be lengthy, but it won't be completely cut.
And China hasn't bullied anyone, unfortunately like others have and do.