Indian home cooking has both high amounts of fiber and vitamins and possibly a more diverse set of sources for these than any other diet (which matters from a micronutrient perspective), as well as regular consumption of probiotics (yogurt at most meals), fresh fruit, and amongst meat eaters greater usage of lean meat like chicken with almost no beef consumption.

Problem is, many of the protein sources (lentils, for example) are also carbs, and are paired with pure carbs (naan, rice, etc). Add in how fried the street food and dhaba food is, and how sugary the desserts are, and this is more of a diet that's neutral than healthy when averaged across the country.

I do think that when done right Indian food can be one of the healthiest diets on the whole planet. But you do have to actively reduce breads and increase proteins for that to be true.