Not allow students' parents to make lunch and bring it over,

Otherwise, they go out to eat, it's normal!

Because student lunches are run by the education department,

the higher-ups are subsidized according to headcount allocations.

If students are allowed to bring their own meals to eat,

Not to mention that it will lead to a lot of people not eating school meals,

And in case there is something wrong with your family's meals,

something happens, the teacher can't look at you and not care, right?