Broadway musicals were disrupted a long time ago, what is left is crumbs for people who have a niche interest; these jobs will not be replaced by AI because it is already an anachronism that has been replaced by other entertainment for the mainstream.

I do think purely AI art isn't really close to disrupting anything since what is being produced without human editing/selection is generally pretty mediocre, as the copy writer in the article mentioned, and we are quite sensitive to the quality of the entertainment we consume, unlike marketing copy.