That makes sense, of course. But (irrelevant to the topic of song quotations) a few times it happened when I wrote a sentense, which, after rational consideration, served no particular purpose. I removed it. Or replaced it. Without it though, the whole extract "read" differently: was harder, dryer, didn't "ring" as it should have... I'm kind of really puzzled about those: if I cannot formulate what those sentenses bring- do they REALLY bring anything at all?
To me, if you cannot, then...they must not bring anything at all. Whatever connection I make to a song or well-known novel, or even a TV show, must show something and be vital.