How come no one sells DLC music?

Hai Guyz,


The one thing I've always hated about Bioware, aside from their storyline cliches, and the fact that they sold their soul to EA, is that every game ever released has had beyond horrible music. In game with no cutscenes or dialog(E.G. Every Civilization game ever,  No Man's Sky). I like to have my own music in the background. However, that is hard to do with MEA, as doing so will often crash the game for me. Some games, such as Lunar and FInal Fantasy, I will listen to the music like I would my regular music.