Kardeshim, the bottom-line is - if you're a part of an inter-continental trade route you win, if you lose that route you lose big time. The Ottomans lost the financial clout after losing the land trade routes to the Atlantic sea routes. In the case of Pak, CPEC is an additional staff, so all transactions are additive!!!! Not to mention all the additional infrastructures, power projects, industrial zones etc. Practices of modern supply chain management will kick in, so more demands for addition of value to the goods as they pass through. For example, instead of fully finished goods, final assembly before the embarkation is desired to reduce cost. It also includes final testing, QRA etc. This all translates into $/yuan etc. in Pak coffers and folks. So, here your gains outweighs loses to a great extent....
With CPEC China will turn into a two ocean power like the USA and, thus, will be able to populate her cities/towns etc. along the entire breadth. And, Pak will be able to add flank-like value (connectivity, distribution, financial, industrial, strategic etc.) the way the West Coast (California, Oregon, Washington states etc.) does to the USA. Guess what? With recent stand-off and threat to cut-off Chinese supplies through IOR India has in fact done a great favor to CPEC!!!!
IMO it's not as simple as that. Any gains for Pak is essentially a loss for India!!!! And, here it's colossal. So, they're gonna do everything possible at their disposal to interrupt it for their salvation lies in Pak's destruction. The problem is they're now faced with far more motivated, determined, persevering and resourceful adversaries than they can plausibly handle. It all translates into severe desperation and frustration which usually lead to delusion/imagination etc....