as someone who loves business negotiations and the excitement that comes with it (i hope i dont come across as someone claiming to be inking crore dollar deals for breakfast, because that's far from the truth) -- I completelyy agree with you
but it's simple economics, doesnt require a bachelors or an MBA:
USA: has other options, but insists on the Pakistani route given that it's cheaper to offload from a port and then truck the goods right across the border
Pakistan: having been royally and consistently misled and screwed over by people with no vision, no pride -- realizes that while in the past it was "Fashionable" to give concession after concession after concession (one after the other) -- that now it's a matter of common sense (in an otherwise nonsensical situation). Those trucks pollute (like any moving vehicle with an internal combustion engine); some leave marks or debris on the road, or potholes....they add to the traffic; and obviously - they are using a public good & service (the road itself)
******, banter, flap arms, turn red and bristle.......but just know this, it's very simple and basic.