@studentguy - because business is an easy major compare to engineering, physics, math, etc. Many prospective pilots are primarily interested in flying and that’s all they care about. The academics and degree is just a hurdle that they have to overcome. Airlines do not care what your degree is in, though most require one to have a four year degree. Buyer beware however, your degree in “aviation business” or “aviation maintenance management” isn’t worth much outside of aviation, and many airline or major corporate aviation pilot hopefuls wind up having to do something else. Schools like Embry Riddle, Purdue, FIT, Univ. of North Dakota, etc., are essentially aviation vocational schools with respect to flying. Have a backup in case the flying doesn’t work out. Even if one gets into an airline flying position (after many years of lower level charter, cargo, and flight instruction work), airline pilots must pass a rigorous FAA medical exam every 6 months. If you cannot pass the exam, your airline career is over.
My advice to prospective pilots is to major in something that has market value outside of aviation such as engineering, math, accounting, physics, chemistry, etc… (in conjunction with the flight training) with which one can get a job outside of aviation as a fallback.