It's not always a case that the parent couldn't find or wouldn't know how to follow a recipe.
It can be that it's too much effort to cook, don't always have the available cooking facilities, can't be bothered with the cleaning/tidying up after. Picking up a burger from Mcds solve all three of those issues.
Or the simple fact that many families don't have a device with access to the internet.
A lot of people in this thread could do with spending some time at an inner city school in a deprived area to get an idea of what deprivation actually means in some places!