(Agreed.)
She does occasionally cook, as in, put together food in her kitchen from ingredients. (Not cleanly, not healthily, certainly not skillfully - we all know her weak points.) But I recently realized that even though she does make the occasional meal at home, she has no idea how to actually get herself fed at home, for more than that one meal.
She hates leftovers and has no sense of how to cook ahead. It wouldn't take much work to roast a chicken and make a few vegetable sides that would reheat well, then eat those for a few days, or reassemble into quesadillas/stirfry/whatever. She can't master planning ahead, and "hating leftovers" rules this out anyway.
With all this in mind, I realized why she cooks so rarely, and why she lets the dirty pots sit in the kitchen getting disgusting for a week. It's because for her, cooking is a huge, messy event, physically taxing, which only feeds her for one meal. She makes, say, meatloaf, eats the one (huge) portion, then either eats the rest soon off-camera, or it goes to waste. I think Peetz is anti-leftovers too, so this is, I think, how things must work in that bizarre apartment.
A person with this kind of "cooking only means a huge effort for one meal" attitude would obviously usually order takeout instead. I guess I'm just left wondering why she doesn't just eat ready-made convenience foods, or just, like, cheetos and ramen? Is it that she can't keep them in the house without eating them? Never mind, asked and answered.