Opinion is opinion, but starting a thread with trite criticisms of the Beatles and calling their career as a group a "flash in the pan" without any real context or factual basis really wasn't intended to shed light - just hoping for some heat and though you've declared it so, there really isn't much, lol.. . . I'm surprised a thread on a subject as trivial as pop music and pop music reputations has generated more heat than light.
As for "light", plenty of accurate background info to be found.
As for inaccurate - when did McCartney sell the rights to his songs, to whom and for how much? That's not opinion, it's just some of the "light" you've covered up a bit with an apples to grapefruit comparison.