Earlier quoted context omitted.
You have to be smart and fairly industrious to cook. If you can't hold down a job, odds are you can't cook well enough to make it a serious value proposition over pre-packaged and restaurant fare.
No, you don't have to be smart to cook. I don't know if you even have to be smart to cook well . I suspect not, because I learned to cook good food pretty quickly; someone who was even dumber than I am might take a little longer, but it still wouldn't be a substantial fraction of a human lifespan. It does take work, but not a huge amount of work, especially if the aim is to feed your family, not to cook well. Oranges…
If you can't hold down a decent job, odds are you aren't going to be much use in the kitchen.