I think Yoko wrote it.
I was a junior in high school when the song came out. At the time I listened to the lyrics and came to the same conclusion this article does.
It’s lunacy. I lost all respect for lennon as anything but a songwriter with that song. I say that because a lot of songs have vapid lyrics, but usually they re love songs.
This one exposed some fundamental fails on his part regarding his world view and understanding of human nature.
Johnnie was OK, till the lads got caught up in drugs. Turned out to be a pompous ass, and his musical ability cratered, such as it was.
Most over-rated band ever, hands down.