Besides, if I may rant a bit: If you have no money, then time, effort, knowledge, and social currency is what you have to spend to get by. Either you're going to spend those things, or spend money you don't have which will make your immediate future immediately worse. This is a situation that sucks to be in, and the only way to have any sense of even partially managing this is discipline. Many of us have grown up in and/or lived through these sorts of situations as adults, and you simply do what you have to and try to be smart about it. Obviously you need to put in time and effort, and do the dishes. But you can buffer things a bit to match your schedule, or establish specific routines, and any little lessening or organization of crunch is a huge affirming step. If you step back for a bit you also see that maintaining your health (including having mental and physical energy) is super important when you have no money and are working hard, and so making food at home hits multiple critically important facets. It does not matter that it takes effort, what matters is that you put forth effort commensurate to what you're facing.
And to position this back to the initial contentious point, it reaffirms my position that it is not an issue of healthy groceries being somehow priced higher, but rather that of stressful life situations that people turn to convenience food (with the time sink of shopping/shorter-prep/cleanup or driving/ordering/waiting at restaurants still intact).