Seriously, all Beatles music comes down to the idea that All You Need Is Love which is the basic theme of this movie. Why people are trying to look for reality here is ridiculous. It is charming. The main characters internal growth is the plot of the movie.
The Beatles disappearing from earth is the same thing as a fairy godmother waving a wand and putting Cinderella in a ball gown and a pumpkin coach. Jeez. Haters gotta hate.
There are clever surprises as Jack comes to terms with the lesson the Cosmos tries to teach him. Why Jack? Why not Jack!
And all to a pleasant soundtrack.