what other worldclass winger did actually also fail to deliver good crosses with the ball despite trying ?
Maybe they were smart enough not to try?
No, seriously, you have Ronaldo, Maicon, Silva, Di Maria, Lahm, Camoranesi etc. Players who we all know can send a good cross. I can't name you each one of them and the exact time when they made a ridiculous cross that they don't normally make, but I know it happened.
At first I and the people who watch with me laughed at all those who made Molinarish crosses, but then we realized that it simply has to be the ball.
Cross from the side, header, goal. How many such goals did we see in this world cup? 3? 2? 1? Not a single one?
Even when the ball is static and a player sends a corner or a free kick, it's much easier to put a good cross, but even here you can notice problems the free kick takers have. When the ball is moving and you need to make a cross, it's almost impossible to make a good one.
Actually, I'd say that Krasic is among the more successful in this aspect. For him I at least remember a couple of excellent crosses which Zigic failed to score from.