I get it. I have a friend that doesn't cook. At all. (she doesn't have a kid, though). It took me a long time to wrap my head around it, just like it took me a while with the other friend that doesn't read. (not illiterate, just does not read other than say, buying groceries or ATM machine use).
And my sister didn't really cook for a very long time, even with kids. She just bought heat and eat foods, raw veggies, and things like yogurt and cereal, cheese, precut veggies, salad kits in a bag, cut up fruit and bread / muffins. Boiling / roast carrots for dinner once a week for a fancier option. She did spend quite a bit more on food purchases.
After 10 year of this (with kids), she started to cook and knows how and does well, but even now, likely only ever cooks 10 recipes and mainly when people come over, not daily. Her DH works long hours, so only does weekend breakfasts.