Why? I am being honest here, as someone involved with recruitment, albeit in a small organisation. They really don't care. They want skilled pilots with the right licence and the right attitude. We don't even look to see if people have a degree when deciding who to interview, we look at hours, types flown and type of flying done. I don't even know if the guy I am line training at the moment has one, and I helped recruit him.
I know a lot of pilots who have gone through the training. I mean a lot, many of them close friends. The one that did best in his career not only had no degree but struggled with his ground school. Instead of a degree he worked in the business, so he knew people and he knew what airlines are looking for. And he earned money instead of getting into debt, so when he had to resit all his ground exams, he didn't run out of money!