Or you build yourself a cute L-shape, then you can just barely see the dining table from the living room, but not more than that.
Large open-plan rooms were statically not possible in the past or servants worked in the kitchen, and you didn’t want to see them, only the finished food.
Nowadays, technology is completely different and of course, you can't work with Ikea appliances which are loud and poor quality. And many people today no longer mainly cook greasy, dripping, and smelly food, but for example steam some vegetables or make a raw salad. If odors do occur, they are quietly and efficiently sucked away by a Berbel or Gutmann and not by the IKEA Molnigt.
I still know it from the parent and grandparent generation, where the kitchen constantly stinks. There’s homemade fish soup again or a big meat stew or who knows what - all things which wouldn’t even occur to us (a lot of meat, greasy, unhealthy, bland ...).
Nutrition is quite a trendy topic right now, surely anyone who occasionally reads a newspaper will have noticed. Even local papers have already featured articles about Paleo, Vegan, Gluten-Free, Clean Eating, etc. There, of course, handled very superficially.
And in contrast to these healthy or supposedly healthy diets stands, for example, the now allowed import of the biggest toxin worldwide (High Fructose Corn Syrup). Because this stuff is extremely cheap, it will soon be used in all ready-made meals.
So, if the appropriate technology is available that works quietly and efficiently, then I see no reason to outsource certain daily living activities to special rooms. Of course, if someone makes fish soup every two days, then a separate kitchen might be better for them.