Sir, there are few things in world which dont have name of the country who is exporting. These are Gold, Petrol/ Diesel, Gas, Diamond, Silver, Copper, Iron and other minerals etc. if you want to buy these stuffs, you would just find the cheapest supplier and get these things, if it is required. No matter from which countries India imports oil/ gas, gold, diamond etc type things, if you can get these things at a cheaper rate from India, especially in this case which may supply gas/ oil to Pakistan within months through border and fulfill the immediate need, you would just go for it
. Rest, there are many trade items like manufactured goods for which Pakistan may think whether they want to import expansive items from West or they want the same type of stuffs from China/ India with cheaper prices. In fact, they would try to build their own industries for the manufactured stuffs which they import from China and also from India to an extent.
India considered all the aspects of importing gas through IPI or from Turkemanistan via TAPI route but it was found, they wont go for it. The first reasons were the ongoing troubles in Baluchistan on IPI line route and second the Pakistans north west states which are on TAPI route and NATO is bombing there. I remembered, in 90s, Indian side wanted the Iran to commit the gas supply on the Indian border and ask for the price of the gas India will get on its border, regardless how Iran does it. But Iran never accepted to commit and they were stick on guarantee of supplying gas till Iran-Pakistan border only and rest the responsibility would go on Pakistan, how they may ensure its supply through their land. Iran struggles with their own Baloch separatists, they never wanted to commit for the things which may happen to over 500km long pipeline through Baluchistan. With these, there was also a group of Indian strategic think tank who worried for any conflict between India and Pakistan which may also interrupt the energy supply, they had recent Kargil war in 1999 and also war type situation in 2002 also.
And the second most important thing which discouraged IPI and TAPI pipelines were the economic factors. It was argued, if India has to give $1.0bn to Pakistan as transit fee and even if it may cost $3.0bn more on maintenance side through deep water gas pipeline from Iran, it is still beneficial to go for sea route. As, if you give $3.0bn to your own workers for maintenance of gas pipeline via sea then they will also pay direct taxes and then they will spend their money in home country itself, means more indirect taxes. It will first employ your own workers and also will keep the money inside the country which will then be circulated in different business activities of India itself, its the money you give to your own civilians for the maintenance of gas pipeline through sea route. It was found, paying $1.0bn to Pakistan as a transit fee would be a net loss and it will have same effect on economy if India pay $3.0bn to its own workers for extra maintenance cost for gas pipeline through sea route
But yes, the world doesnt stop here. If we move forward then we will find many opportunities in future. Trade link to Afghanistan and Central Asia though Pakistan always attracted India but we have to liberalize the bilateral trade first and then we would move for the next steps