Truth is there are much better musicians out there (eg Henricks, Paige, Clapton, Elton John etc etc), but I agree that calling them average musicians, their music "noise" or merely a boy band is outlandish.
They dabbled in everything. In the White Album, there's the Carribean inspired Oobla dee obla Da, the heavy rock/metal Helter Skelter, plain rock songs like Back in the USSR, pyschadelic stuff like Dear Prudence & Happiness is a Warm Gun, anthems like Revolution, Old Western song like Rocky Raccoon, Blues song Yer Blues, ballads like I Will, Mother Nature's Son and Julia, psychedelic rock with While My guitar gently weeps, and even 20s ball room music with Honey Pie.
they were given full artistic freedom on that album.
I can call bands I don't particularly like out without calling there music trash or anything. Like Zeppelin, I don't particularly like them, but they're great musicians.
Maybe it's relative tho. I know a few goth metal guys or whatever who call Zeppelin's music pop or equivalent to boy band. I think it's hyperbole.