did you mean PDQ Bach?
Labels don't have much actual musical usage (unless it's the 'i like X what other bands might I like?" - X the unknown not X the punk band), but I do think there can be a sociological usefulness to them
like why does Hip Hop happen when it does? Why punk? why British invasion? why does the Nashville sound suck so much?
thee labeling is a short hand that allows for broader cultural discussion