To show the impact the Beatles had at the time.
I remember the day the Beatles album Rubber Soul came out. 14 new Beatles songs and no old singles or "B" sides to pad out the album (an unusual thing in those days).
This may sound an "ordinairy" pop album nowadays, but it was big stuff back then, adult lyrics and unusual instruments (French Horn, fuzz bass, sitar etc).
Anyway, a friend of mine had a party within days of it coming out, and all evening that is all we played, side 1, then side 2, then side 1 again and so on, right through the party. We played nothing else.
THAT is the impact the Beatles had, and if you were not around at the time you just cant understand it.
I guess it was the same when Elvis first came out in the mid 1950s, or Frank Sinatra became the first "hearthrob" in the 1940s. Their songs now can seem "tame", but at the time it changed the face of music.
And here is "Girl" off the album, another John song
https://www.youtube.com/watch?v=ZshCZndWmco