I think your definition of a play maker is off. While it's true that "traditional play makers" dictated the tempo of the game more than modern attacking play makers, the were far from Xavi, Kroos and the likes as well. I very much doubt that somebody like Zidane, Laudrup, Riquelme, Pelé or Maradona ever registered 90+% passing accuracy, let alone 95+%, as Xavi or Kroos regularly did/do. And I believe that their touches per game, passing accuracy, shot attempts, etc. were much closer to Messi than to the players you mentioned. And while some might actually have been less risky in their decision making, many legends who are considered play makers were at least as risky as him (Ronaldinho, Laudrup, Zidane, Maradona, Zico, ...). If Messi isn't a play maker to you, I'd be curious who is.
Personally, I think there's no player who's better at advancing the ball up the field than Messi. He's not only incredible in terms of through balls, dribblings and finishing, he's also incredible at finding team mates between the lines, exploiting the tightest passing lanes and also switching the play to the other wing. That to me is play making - creating and finding space for yourself and team mates, unlocking defensive blocks, getting the opponent to move his formation, initiating transitions from static to dynamic situations and so forth.