Well, how many times do you hear a Beatles influence in current pop music - constantly. A CD of their 27 (!!) #1 hits that's selling in the Britney / NSync range. They still have a huge sales appeal and are extremely influential in music being produced today - transcending all other musical artists of this era would be a strong statement, but hardly dismissable.
You're irritated by everything musical your kids like and define rock and roll as "anything musical that irritates the parents" - hmmmm, sounds like a nice objective starting point for evaluating the merits of the genre. For somebody who has such a distaste for it, I'm wondering why you spend as much time as you apparently do listening to or researching the playlists of Classic Rock radio stations - who, pray tell, still listens to FM at all regularly, much less a classic rock station? To hold up their playlists as evidence of the significance of a band's contributions is just irrelevant.