If you kill the prisoners, and you don’t harm the Dementors, what’s the point of attacking at all? The idea is to rescue the prisoners and destroy the prison, and the prison is just the Dementors—a non-magical building is easy to replace.
It’s not a non-magical building; it has several protective wards, such as the time-loop prohibition. But otherwise, I agree with you.
If you kill the prisoners, and you don’t harm the Dementors, what’s the point of attacking at all? The idea is to rescue the prisoners and destroy the prison, and the prison is just the Dementors—a non-magical building is easy to replace.
It’s not a non-magical building; it has several protective wards, such as the time-loop prohibition. But otherwise, I agree with you.