Short answer: Getting your instrument might make you “stand out” a bit more
Longer answer: While the “whole person” concept is a thing, keep in mind, the chart that you keep referencing is just a chart, it’s statistics and averages. Focus on what you can control (Test scores, letters of rec, aviation or personal experience) and let go of the things you can’t (Slots available, timing, needs of the AF).
Granted I’m coming from the Marine fighter community however being a good or great tactical aviator takes more than just test scores, GPA, college major or where you went to school. Some of the best pilots I know have non-ivy league, non-STEM backgrounds that worked hard and had grit and passion for tactical aviation.