Unfortunately, music is a male-dominated industry. It's not that there aren't plenty of women working in the industry, it's just, the higher up you go. . . it's like how women who play in the WNBA make so little, compared to men in the NBA.
There is a difference between happiness, the supreme good, and the final end or goal toward which our actions ought to tend. For happiness is not the supreme good, but presupposes it, being the contentment or satisfaction of the mind which results from possessing it.