Bilal, never mind. I am happy to see that you recognize that Urdu is a descendant pre-Islamic Prakrit languages (albeit with the addition of loan words).
You've admitted that Khari Boli is not Hindi. And yes, the things you've said about Urdu in your quote above applies to Hindi as well, although there isn't any verified historical & cultural context during that time that a separate language called 'Hindi' was formed alongside Urdu at that time. As I've mentioned before, it makes sense from a historical & cultural point of view that Urdu as we know today was formed at that time. I've mentioned that in a few posts before.
If the language you call 'Hindi' today (which you don't call Urdu) is actually Hindi & almost the same as Khari Boli, why do you have so many Persian & Arabic derived words in the 'Hindi' today? After all, Khari Boli is the pre-Islamic era with no Persian or Arabic amalgamation into the Indian subcontinent, right?