Expanding music boundaries, Nusrat, Purist and the Dilemma

I was watching one video of Nusrat Fateh Ali Khan singing in his usual unique and captivating style but could not resist seeing the shabby stage and facilities he was singing in. There were those cheap decorations on the wall, bad acoustics and sound systems. I had heard this debate where people say that Nusrat has made such a class of Sufi music "cheap". This kind of music was supposed to be for those people who really like, understand and admire it. It was not made to be heard in a paan or barber shop (figuratively speaking). However Nusrat (like Jagjit Singh in India for Ghazals) popularized the Sufi music to masses. This quest lead him towards west where the people would not understand what he was singing but based on the way it was sung, the clapping of chorus, the ragas, the rustic harmonium, tabla etc made them dance on this music. This gave Nusrat world wide recognition as well as money. Now he could sing in the Wembleys or Royal Concert Hall. However this also impacted in dilution of the following of real music appreciators of Sufi music. Sufi music became a fad which everybody wants to "do" now. However had Nusrat not expanded his musical boundaries he would have met the same fate like many other slatwarts who died penurious death due to want of money. At the same time this expansion introduced the West to a large degree about a different kind of music which surpasses any kind of music (apart from Mehdi Hasan's Ghazal singing). Therefore in a way it was a good initiative in terms of financial and recognition sense. Nusrat would have been singing in the same shabby PTV shows or those pathetic gatherings of rich people from from Lahore. Hence I believe once some phenomenon or concept expands beyond its natural habitat its bound to get diluted in terms of its quality, following, target segment etc. However this expansion may invariably be needed if that phenonmenon has to surpass the boundation of time.