Having a degree does not give one the ability to be better at “flying the airplane.” But to play devils advocate here, it does help a potential employer find applicants with a higher likelihood of having certain qualities. For instance, a better understanding of statistics (misunderstanding this post being a good example of this). A higher likelihood of good reading comprehension, study habits, attention to detail, math skills, critical thinking skills, and a host of other skills picked up in school that aren’t directly related to underwater basket weaving. Same reason an employer looks at your speeding tickets or your volunteer work, they are trying to discriminate against some people who they think are statistically less likely to be the ideal candidate instead of wasting time and effort interviewing every possible applicant.