I think that's what rubs bassplayers the wrong way about Wentz. Or at least it does for me. It seems that for him music is a means to an end and not an end unto itself. An article on the band stated that he isn't involved in writing the music, but only acting as a lyricist. He's Bernie Taupin using the bass as a prop to get himself onstage.
I don't see that as a major problem. The bass isn't the be-all and end-all for everyone. He does care about his craft- writing the lyrics. Somebody's gotta play the simple bass lines, why not somebody who's involved in writing their material? His bass playing doesn't hugely detract from the quality of their music which I personally am less than thrilled with.
