I would strongly disagree. And it sounds to me as if you have not much knowledge about what they actually did. As others here have pointed out, they were very much on the front when it came to experimenting with new technologies and different ways to create sound. And even if there were other bands (of course there were others), most of them do not come even close to the impact the Beatles had.

None of us who didn't live in that time can fully grasp how important the Beatles were. Their songs not being "all that interesting" is a viewpoint under todays' standards where just about everything has been done before. A few things of what the Beatles did had simply never been done before.