1. For the rapidly expanding middle class, with much disposable income, focus has shifted to quality in the last decade. No longer are dingy kitchens acceptable.
2. Modern restaurants and take-out only kitchens (propping up to server customers of food delivery apps) use modern equipment and generally maintain good hygiene.
3. People are willing to spend a bit more for quality food and it shows in the markets. Cheap and dirty kitchens are being phased out.
4. For decades in the past, India had innumerable 'Tiffin Centers', where the primary target is the daily labourer or office goer, who goes to the center, orders a breakfast, stands on the side, eats it and leaves. In these kitchens, the full kitchen is always in view of the customers. There are no tables or chairs for people to sit, just raised platforms on which the plates are placed and food consumed. This culture of an open view kitchen is very prevalent in India, and is usually self regulating, quality wise.
Off topic: This would be a huge cultural change. I have tried it a couple of times with rice, but to me it ruins the meal. I've never seen anyone else do it.
Reason for this culture might be cost of a meal to cost of rice (curries will have lots of good meat). Maybe other things like unwillingness to wait to eat or rice is culturally considered a meal more than a staple. (Buying a cooked chicken to have with bread at home is common). It is interesting. Breaking cultural norms is a way to make $
On Topic: Your idea is sound, the million $ part is fitting it to regulations (or getting around them)