I always had to think of my grandparents when discussing GDP. Aside from being very much part of the regular economy, they were also quite self sufficient. When my grandmother died, we found rows and rows of bottled jam. Some decades old according to the labels. My aunt did the taste test, and according to that at least, they were still very much edible and yummy actually. To the GDP that whole side of life is invisible. But it makes a big different in terms of resiliency when disaster hits. I'm assuming it was a reaction to WW2 or maybe it just is what people always did. I'm guessing that a lot of people in India are quite self sufficient (although I wouldn't know) so the financialization of every day life and resulting gdp growth is indeed a flawed indicator.