Many students at CCs are self-supporting non-traditional students, so it is not surprising that the cost of attendance would include living expenses, just like how the cost of attendance at residential four year schools does. Even students living with their parents still cost non-zero amounts of money for food, utilities, and commuting costs.
Of course, that does not necessarily mean that any given student at a CC (or other school) will be careful about taking out student loans that s/he can reasonably be expected to pay back after graduation.