I know back in my drinking years hangin out at bars doing karaoke... you never questioned anything the KJ did that was his preference such as not having words on the big screen... lest you find yoselfs no longer in the rotation!
Maybe things have changed in mo modern times, but that maybe the reason nobody ever requested the words be put on the big screen out of fear of offending the KJ dude guy... after all, they wanna sing!