Fast food & microwave dinners are a form of industrialized kitchens but not the only one it can take. You can also have centralized factories that produce thousands of boxed lunches per day. Japan does this with ekiben for example.

Cooking is a part of domestic labor. It takes up free time out of work, it's unpaid, its workers tend to be women, and it's individual instead of socialized labor. Everyone ought to be able to cook for themselves if they want, but automation and collectivization of cooking (and the domestic sector in general) is desirable.