I think that our current culture assumes a) The Beatles were universally loved, and b) That they are considered a rock band.
I'm just pointing out that a significant portion of the contemporary rock music fans did not particularly like them, and considered that they were a departure from "real" rock and roll.
I think it's an understudied phenomenon. Not all people who liked the beatles were hippies, but I'd venture that the anti-Beatles folks saw them as first, beatniks, and then, hippies.
I don't think that anyone who actually knows anything about music assumes anything. First of all, obviously they weren't universally loved - just as many thought that Elvis ripped off the "black" rock music, a subset of people thought that the Beatles weren't quality musicians.
My point is that, just because
you don't like something, you can't just universally discount it. I don't like peas (similar to a significant portion of the population who also despise them), but that doesn't mean they're not a vegetable. Just because a genre or style of music is distasteful to you doesn't make it invalid.
You also need to be looking at the times of release. You're trying to compare The Beatles with hard rock in the vein of the '70's - well, it was a different time. You held up Buddy Holly earlier as a "rock" musician (which I would absolutely agree is true) - please show me three of his songs that hold up as "harder" rock than "Revolution," "Back in the U.S.S.R.," and "Helter Skelter." (I really can just keep picking stuff from
The White Album.) You can't, because he performed a different genre of music primarily at a time when the musical landscape was different. It's like comparing apples to oranges. You're also looking at a group that were primarily overseas, and I suspect you're largely only looking at their early career - if you compare them with their British contemporaries of the psychadelic rock movement, you'll find that they were often more "hard rock" than their rivals. A song like "Come Together" sounds a lot harder than "Whiter Shade of Pale" by Procul Harum, or even some of The Who's early forays into psychadelia, such as "I Can See For Miles." There are obvious exceptions to this, but The Beatles were, in every sense of the word, a "rock band" of the time.