Quite so; but I've rarely come across a song set to one of those classic airs ("Dawning of the Day/ Raglan Road" being an honourable exception) that does justice to the tune.  Usually, unfortunately, the lyrics are trite and would disappear without trace in ten minutes if they didn't have the melody to parasitise.  People who want to make memorable songs really should either learn how to write properly, or make their own tunes; I stand by my threat!

Malcolm