@GMTplus7 I think that obscures the function of probability. Probability helps us to assign a confidence in the absence of complete information. Of course you wouldn’t dispute that we live in a deterministic world, but you would still say the probability of getting a heads when flipping a coin is 1/2, even though given all the information about the physics of the flip it’s deterministically either heads or tails.
It’s not possible for an individual to know for sure how adcoms will see his/her application. People are also notoriously incapable of avoiding bias when asked to judge themselves holistically. By using data about other applicants and similar students you can make predictions and assign a confidence to those predictions, which is really the value of probability.