Personality tests are some of the most subjective and unfair measures imo.
There’s been extensive psychological research that shows that unconscious bias plays such a huge role in everything ranging from skin color, to symmetry of ones face, to the length of your name.
Even extending this to written work, such as LOR’s and wording of EC’s and essays, it seems extremely likely that kids who are just trying to be sincere, can come off wrong and thus be dinged by AO’s in the personality column.