Kitchens were out of the homes a few centuries back due to fire codes back then (from what I learned in the plantation tours in Louisiana,US). Today there is no reason for kitchen not be in the house. With all the news about pollution, potential pandemics, it is good to have a controlled environment where the food you ingest is prepared (even though ingredients are not 100% controlled).

Personally, I find cooking meditative and relaxing after a long day in my cubicle and I enjoy eating what I make myself sans excess oils, food colors, etc.