Yeah i find this just stupid, sure if the guy was lazy and didnt care about actually testing a person based on their own merit and ability, but this is just a forced trope of labeling. "He's a lost person therefore must be weak and without even the ability to learn" Such an utter trash trope. A real trainer would have seen they were marked as X, and then tested them to see if they have any ability before declaring them worthless. If they pass it can be used to motovate others into learnig, if not then they can be directed into paths that more suit their skills(such as administration or other jobs that require mathematics and literacy.)
Now there will be a few rounds of him kicking the trainers ass and the trainer's embarrassed suprise that a lost person was actually capable of being more then a endurance at best.