I do not believe that the Beatles were geniuses in the lyrics in which they encompassed their music in. It was perhaps the actual rhythm and tone and percussion in which the did so. It was the outside envelope which consists of 3 beats really. All the popular songs have 3 beats, that repeat themselves over and over again. They vary in tempo and weight but still they remain. I guess when you find something good you tend to stick with it, but the part I don't really feel is right is that they are standard rock beats with a few minor alterations. Maybe they were the ones that created these standards. I'm not old enough to know I guess.