It's not so much what you learn about Mumbai it's what you learn about yourself really. It's a funny old hippie thing but it's true as well. You find out a lot about yourself and your tolerance and about your inclusiveness.
I have lived in Mumbai for more than 20 years have my domicile here my home and family here.
Each of us needs something - food liquor pot whatever - to help us survive. Dracula needs blood.