It's possible that the fixture is purposely made to not be opened by
students/tenants/office workers. The intent would be to keep people
from stealing bulbs, making dangerous extension cord hookups, or
swapping in higher wattage bulbs, etc.

Kind of like the restroom panels/fixtures with "one-way" screw heads etc.

As others have said, bulbs should a building maintenance issue anyway,
unless you have dorm rules to the contrary.