That's us.
Since they both have 'hot' school lunches (which are ok on the nutrition/balance side) - yes, we often don't 'cook' for dinner. We'll have 'bread and stuff' where the stuff can include eggs, beans, salad veg, lettuce, avocado, cheese, sausages, yoghurt, and fruit (not all of that every day!) Or wraps with similar sorts of fillings.
My kids eat veg raw, but tend to refuse when it has been cooked. I don't want to turn mealtimes into fights. So they eat more healthy, balanced meals when we have a 'light and easy' dinner.
DS eats as much of his 'hot' school meal as he is hungry for. DD barely touches it, and comes out of school ravenous. If I gave her another 'hot' meal for dinner, she'd starve! No, in fact she'd try to live entirely on snacks.
Sometimes the 'cold' meal is the healthier/more filling one.
We also come from a culture where the main meal is had as a family at lunch. Because children go home from school for lunch, and adults go home from work for lunch, in many cases. We've had to adapt hugely as it is simply impossible here for family life to revolve around lunch! But both DP and I tend to have a 'hot' lunch, we've kept that up, but the 'family' aspect of the meal has moved to dinner. Which is often not 'hot', and doesn't need to be.