All "sorting" systems have different outcomes, I'm not sure why differences should be necessarily flaws.
In many countries there's this centralised testing system where kids take an exam the same day and are placed in schools by preference and that score. So you make a list of schools you want and the school quotas are filled by that preference list with the higher scored candidate gets the place.
The result? A school ranking created by high-schoolers and their parents because the "best" students go to the school with the most applicants with highest scores.
The problem here is that it creates almost automatic placement for students by score. So if you are really good at math and sciences you score highly but you can't go study physics because the physics departments usually have low minimum scores due to their weak employability and medical schools have very high score due to almost guaranteed employability and high status and compensation. This means, kids scoring well all go to the same schools together with all the other scoring well irrelevant of their interest or aspirations. The thinking goes, if you scored well enough to study medicine you will waste your score if you study something like architecture or chemistry and they are forced to pick something from their score range.
In many countries there's this centralised testing system where kids take an exam the same day and are placed in schools by preference and that score. So you make a list of schools you want and the school quotas are filled by that preference list with the higher scored candidate gets the place.
The result? A school ranking created by high-schoolers and their parents because the "best" students go to the school with the most applicants with highest scores.
The problem here is that it creates almost automatic placement for students by score. So if you are really good at math and sciences you score highly but you can't go study physics because the physics departments usually have low minimum scores due to their weak employability and medical schools have very high score due to almost guaranteed employability and high status and compensation. This means, kids scoring well all go to the same schools together with all the other scoring well irrelevant of their interest or aspirations. The thinking goes, if you scored well enough to study medicine you will waste your score if you study something like architecture or chemistry and they are forced to pick something from their score range.