The world champion (which is determined for classical chess) isn't even remotely the best player. He's barely even in the top 10 and may soon fall out of that too. In terms of strength he's the weakest player to win in half a century even in absolute terms. And I can't think of any time in modern history of chess when such a low ranked player won.
We really need to do something to reinvigorate the game. Chess world championships used to be front page events. The winners would be stars and everyone knew their name. Now, even I don't bother to follow anymore.