you're right he can't sing.
And despite this, he is 10 times better than any of the others
He is original
He dared sing his own song as opposed to a cover
He has a full act - with backing dancers and the Chico clock.
He can't sing but he sure can dance!
He stands out from the crowd, which is something none of the others do - for all their talent, what they've done has been heard 1000 times before.
The X Factor is about who's got the X factor - the ability to get noticed to sell more records. He's got it!
Sorry, but I am setting my watch on Chico time