She is contrasting being gay as a sin with profiting on “faith and vulnerability”. Nothing to do with “music is bad.”

Emphasis mine.

“Because this is a man whose entire faith identity is built upon a faulty structure of self-hatred, to please a system that would rather cover up abhorrent behaviour for 20+ years (and make money off of it) rather than accept that being gay is not the problem,” Williams wrote, giving her perspective of having grown up around faith-based music communities in the Nashville area.

“I grew up around this. I am not afraid of any of these people — most of them have written me off anyway by now. How many stories like this from this VERY small corner of the music industry will we hear before we realize that capitalizing on people’s faith and vulnerability is the ‘sin.’”