He could have had sex, sex, sex; with numerous willing and worshipful women. Instead he was madly in love with a bitter and ball breaking shrew.
Lennon as a philosopher? Yeah, sure. Because “All you need is love” and “I am the Eggman” are deep philosophical statements and NOT pop bubblegum music for the masses.
Posing nude on an album cover with a woman not your wife, while married, is part of the debauchment of the whole generation, so yes, Lennon promoted the sexual revolution, and yes Lennon’s songs convey a hedonistic, Nihilistic philosophy, just look up the lyrics to “Imagine”