Of course seizing Karachi doesn’t mean actually entering the place, it would near impossible to anyone to take control of such a mess like a twelve million inhabitants developing world’s town.

The key is to have the capabilities to cut off the logistic routes to the town, and it won’t mean actually doing it, just to have the capabilities forcing this way the opponent to build up the proper countermeasures, depleting resources.

An actual landing would result anyway in bloodshed, at least until Pakistan is ready to counter the landing.

Pakistan being ready is the strategical target, it would require land, air and naval assets to be locked down, even built from scratch, just because India purchased an half century old amphibious ship for almost nothing and is going to build three more for little expense.

Then the ships will see assigned to them far more foreign aid and foreign policy’s tasks than war tasks, it is quite logic and straightforward, nonetheless they will be a real asset in the indo-pakistan confrontation without even sailing.