I’m aware of the doctrinal decisions that led to the creation of the SH-15, I’ve already detailed all of what you said in one my previous posts and agreed with you when you repeated it, there’s no need to repeat it again
However I will comment on the last line, SH-15 is designed according to PLA doctrine, but PA doesn’t have the same doctrine, they’d have preferred a heavier SP with an auto-loader, but China gives the better deal, they give ToT and they are willing to modify their guns, hence it makes them a more appealing option for the PA, even if it doesn’t fully fit their criteria. Pakistan is never going to need to transport these guns by air.