I'm not sure if AI slop will make a bad situation much worse tbh. The pop stars of the 60's to 90's always depended on a distribution platform/network (record labels, radio stations, MTV, ...). Those distribution platforms either don't exist anymore, or changed their 'business model' to f*ck the artists at least two decades ago. To find the really good stuff you already have to look elsewhere, and popular music was already 90% mass produced "slop" before AI entered the scene.
E.g. this ancient Frank Zappa interview about the decline of the music industry is still as relevant as ever: