I was the sole non-music major in my college (UCLA) jazz ensemble trpt section as a freshman, and deciding to get the major in music was already decided for me... I didn't need it! Got in the concert band, the theater dept. played around in LA. I could study economics and broadcasting, a big love of mine, to my heart's content and play music as much as the practice rooms would have me, and then went on to play in bands for a while until finding radio work. And now for the big BUT.....
of the other three music majors in the section, one went into real estate, has a great family, made great dough and still plays gigs most everyweek, one went on Harvard Law and became an top IP attorney and still plays gigs most everyweek, one went on to compose for television and made a fortune, another went on to score films and made even more. We all still keep in touch.
The moral of the story, do what your heart tells you to do and keep you mind open to every avenue the music industry has to offer. Doctors play music; my uncle worked his way through med school playing in big bands. Even band directors in good school districts have wonderful lives, travel with the school bands, get pensions... there's more opportunity than you think.