That, plus most outsiders have no way of determining how a given student’s subjectively graded application characteristics compare with the other students in the college’s applicant pool. Indeed, for most applicants, there is no one person outside the college’s admissions office who sees the entire application (even the student, who commonly does not see the recommendations, nor necessarily knows which potential recommenders will write the best recommendations for him/her).
So even though a college may score applicants’ on numeric scales for each aspect of their applications, and then those with better scores are more likely to be admitted, getting from subjectively-graded application characteristics to those scores is opaque to outsiders, including the applicant and those who would be advising him/her (except possibly at a well-connected prep-school, although the presumably-well-connected college counselors would not be as “outside” as most outsiders).