That might have something more to do with almost one in four people in India being a tobacco user[1]. CDC suggests that one in four CVD deaths (in the US) is caused by tobacco use[2].
[1]: https://globalactiontoendsmoking.org/research/tobacco-around...
[2]: https://www.cdc.gov/tobacco/about/cigarettes-and-cardiovascu...
It has more to do with people who are on farming diets but no longer farm.
People in India smoked just as much when they weren't living such sedentary lifestyles.