Earlier quoted context omitted.
Poor people should properly budget and cook at home to avoid staying poor If you can afford to eat McDonald's nobody cares (well it's not healthy either but that's a different matter that doesn't really have to do with being poor or not)
You don’t have time to do those things if you are poor and working 2-3 jobs. Properly budgeting and analyzing costs takes a lot of time, and unexpected expenses and cost of living increases destroy your budget a lot more than McDonald’s.
Cooking at home saves you time if you do it right. A slow cooker, frozen meat, frozen veg, stock powder. Cook a batch and put into containers for the week. It’s not hard to develop a healthy, cheap, quick approach to eating. Most people find ways to keep justifying their existing opinions, that’s the real problem of poverty. It’s rare that people adopt an experimental approach to their problems to learn unexpected solutions. So to my mind, poor is more about being rigid, rather than a lack resources.