In fact, there have been and are still very good writers in Pakistan. Forget about movies and TV series, better content than that, Pakistanis breaking up for YouTube and Facebook. This should solve these arguments once and for all.
You can hire someone like Scorcese and pumped the movie with billions of dollars in rupees, but even a bad scenario can not flip a bad flick. In computer programming there is a concept like GIGO, Trash entry, trash exit. Waiting for a filmin based on a bad script to be good, waiting for the trash box to be delicious and not kill you.