Well the Bombay film wasn't always like how it is now. It did have a local industry. There were realistic films made on local scenes. But it gradually changed over the years.
What is attempted in these film is of course a synthesis. But it can be seen by someone who has his feet in both cultures. Someone who will bring to bear on the films involvement and detachment in equal measure.
Sometimes a director is making three films. Perhaps he is shooting a film in Madras and a film in Bombay and he can't leave Madras as some shooting has to be done, so he directs by telephone. The shooting takes place. On schedule.