>just a race to the bottom of taboo-breaking
You've basically described cultural art and music since at least the 1950s. Elvis dared to play black music and gyrate his hips. Madonna rolled around in a wedding dress talking about virgins. RAP broke a whole bunch of them. Cardi B sang about WAP. If a band just sings about relationship troubles and drugs like everyone else, their music / art probably isn't very remarkable.