I see the writer is here. I just want to say I understand your sentiment, but your title and content are filled with some annoying misinformation and discrepancies.
First of all, Nastaliq is not "the Urdu script". If you even skimmed Wikipedia, you would notice that the script does come oringinally from Arabic (where it is used, but more to your point, sadly not as much in print media, at least from my experience in the GCC) and was later well loved by the Persians, and later different portions of the Indian subcontinent (India, Pakistan, and beyond). To call it Urdu script, just because it is popular, and to insinuate that it Naksh is the default script of Arabic (it is not the preferred one, by the way) is a huge stretch.
Another point: Naksh was invented by a Persian, but who grew up his whole life in Arab Baghdad and was an Abbasid court vizier in modern-day Iraq. He did not spend time in Iran (then Fars, as it is known today in Arabic), until he was a tax collector there after growing up in Iraq, and only for a period. He might have been ethnically Persian, but to call Naksh script Persian because of the guys family background is far-fetched, especially if you know how loose the cultural boundaries between Abbasid Iran-Iraq were (they were part of the empire and people, goods, and ideas freely flowed between them). It is a derivative of Kufic script, and has strong ties to the religious intellectual history of Iraq (Basra and Kufa were the seat of a massive amount of religious scholarship and still prominent beliefs in Islam; scripts and art were an awesome by-product).
Sorry for the rant, but I know this is probably not your field. As I guy who spent a lot of time studying Arabic and Arab and/or Islamichistory, I get very annoyed at the misinformation peddled by people about Arabic history and culture. I do not mean to be so blunt, but I hear people rattle off misinformation like this often, and it irritates me.