Oh look, another guy who thinks influence = person's relevance, but wait... Didn't I just explain that they aren't the same thing? Yup, I think I did.
Who cares if the lyrics mean something? If the beat is knocking, and the artist can flow, construct a good song, and throw some emotion in there, lyrics don't mean shit. I look at them as something extra an artist can have, but isn't necessary at all. If you're really fiending for knowledge and whatever BS, go read a book or do a sudoku puzzle, instead of complaining that something like music, which is more commonly considered to be a means of expressing the emotions of the speaker, lacks logic.