"Silly Love Songs" rates as one of Paul McCartney's greatest songs. Indeed, it may be considered his ultimate philosophical treatise as well.
For starters, you've got a model pop song melody. It's uber catchy. It flows. It has that gentle love feeling. It's Beatle worthy.
Then listen closely to the bass line. He's practically got a great whole second counterpoint melody going on underneath.
He also whipped it up into an expertly made RECORD as well. It has a gentle, but deep and smooth groove and a unique sound.
On top of which, the lyric seems to be actually one of his most substantial as well. Take the lyric and by extension the song and recording as the best and most direct retort to Frank Zappa's famously negative outlook on pop love songs, best expressed creatively through the classic satire of Cruisin' with Ruben and the Jets.
"Some people want to fill the world with silly love songs
And what's wrong with that, I'd like to know"
I'm just saying that the gentle love and romance of such songs as this rate just as legitimate as topics of art as any existential angst or anger. "Silly Love Songs" has at least equal emotional and philosophical legitimacy to the work of, say, Eminem.
Paul McCartney makes like Mr El Senor Love Daddy, spreading the love song vibe across the world. Yeah, hearing this you have to think the world is a little better place for it. The sublime musical presentation of his argument for the defense here should convince any wise and discerning listener of the merit of his position.