Neither does Urdu have an independent history from Hindi
The word Urdu didn't come until the 1800s just like Hindi didn't come until the 1800s. And it might be your ignorance that you think Iqbal or Amir Khsrau is not comprehensible to Indians/ They might not be able to read Nastaliq script but if the same poetry is in Devangiri then they will be able to understand it. At least as much as an average Pakistani can. Not to mention the 50-60million Urdu speakers in India as well.
The word Urdu didn't come until the 1800s just like Hindi didn't come until the 1800s. And it might be your ignorance that you think Iqbal or Amir Khsrau is not comprehensible to Indians/ They might not be able to read Nastaliq script but if the same poetry is in Devangiri then they will be able to understand it. At least as much as an average Pakistani can. Not to mention the 50-60million Urdu speakers in India as well.