I would, however, distinguish between lyrics and vocals. If I sing along to a song, of course I'm singing the melody that the vocals carry in the song. That doesn't mean I comprehend what the lyrics mean.
I'll put it this way regarding TWGMTR as an example. Beaches In Mind could have the most sophisticated lyrics in music history and I still wouldn't much care for it as a song. Meanwhile, From There to Back Again literally be reciting gibberish (in the case of some songs they might as well be anyways

) and it wouldn't do much to hurt my high opinion of that song.