Maybe a slightly more generous take isn't that humans are random, but their value systems have some sort of distribution. I'm unfamiliar with gymnastics scoring, but judges may have different perspectives on what matters most if you take a sport like boxing that applies subjective scoring. One judge may value footwork and the jab more, while another weights power punches more, while another is swayed by seeing a competitor who is bloodier by the end of the fight despite having a more technically proficient fight.