Do you want to be unique? Do you want to be known because of your different style? I guess Indie Music Artists have similar visions and perspectives in life. They want to produce extraordinary music such that they fulfill and satisfy themselves at the same time satisfying and entertaining listeners.
Being extraordinary can lead you to the peak of your career. Most artists indulge in indie music because of this reason. Aside from being unique they also want to boast to everyone that “Even I am not popular, I can be popular in my own music, in my own way.”