A student who gets an A when they should have failed the course may be wrongly encouraged to continue in that direction when they really ought to change programs. This could end up costing that student a huge amount of time and money, to the point of jeopardizing their ability to graduate and ruining their future.

Failing grades aren’t supposed to just be a punishment for not studying hard enough. They can be a warning sign that the student may need to try something else.