How did this Filmmaker, Who Threw Out Superstars Like Dilip Kumar and Amitabh, Become a Hit Showman?

Nasir Hussain was an Indian film producer, director, and screenwriter. With a career spanning decades, Hussain has been credited as a major trendsetter in the history of Hindi cinema. For example, he directed Yaadon Ki Baraat (1973), which created the Hindi language masala film genre that defined Hindi cinema in the 1970s and 1980s, and he wrote and produced Qayamat Se Qayamat Tak (1988), which set the Hindi language musical romance template that defined Hindi cinema in the 1990s.[6][7] Akshay Manwani wrote a book on Hussain's cinema titled Music, Masti, Modernity: The Cinema of Nasir Husain.
How did this Filmmaker, Who Threw Out Superstars Like Dilip Kumar and Amitabh, Become a Superhit?
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How did this Filmmaker, Who Threw Out Superstars Like Dilip Kumar and Amitabh, Become a Hit Showman?