Making food from scratch is cheap. It also doesn't take much time unless you want it to. Choosing not to cook has become performative learned helplessness.
I was far more likely to cook from scratch when I was poor than when I was not. And honestly, the food was healthier too. Basic life skills.
I really want the "cooking is too expensive" crowd to show me where they're getting their cheap food. I would struggle to make a homemade burger cost as much as a McDonalds quarter pounder. Even if I used twice as much beef.