From what I've heard, he does recite his songs. Though I thought I heard him approach a singing voice in a couple of these things. It's best that he accept his limitations, and anyway, it works. I like the tone of his voice, and he's thinking about the meaning of the words. Some of the best voices pay no attention to the words. So, even if they can really belt, are technically outstanding, there's no dramatic effect and suddenly it's so shallow it's an offense.
There are some traditionally great singers, and this is partly subjective, but whose voices and shallow lyric interpretation make me cringe.
Well, they are not technically outstanding if they can't give two winds to the words. Enunciation, stage presence, punctuation are all critical elements of singing.