The auditorium is filled with the first years and yet it isn't filled to the tenth of its capacity. By that one can see how big it is. Though not all first years are here, yet one can confidently say that the auditorium is built for a larger audience.
Jake arrived five minutes before 8 A.M. and was surprised to see a lot of first years, he thought that everyone would be busy with levelling up and would be late for the meeting but he was wrong.
He now understood that most of the students that were admitted should not be someone who can't follow rules properly nor would be lazy.
It is not easy to eliminate them through just the academy exams as that exam is not a perfect way to select the students as students with the highest combat score would be prioritized. So, the academies would have their own ways to test and eliminate such roots.