Question

why did bismillah khan not delve deep into the world of cinema​

Answer 1

Bismillah Khan entered the world of cinema but left as cinema was not of his interest. He was more interested in music rather than films.

Answer 2

Bismillah Khan entered the universe of film yet left as film was not of his advantage. He was more keen on music instead of movies.

Bismillah Khan declined one of his understudy's demand to begin a shehnai school in the U.S.A. since he would not live far from Hindustan, explicitly, from Benaras, the River Ganga and Dumraon. Subsequently it is successful.