Although i also believe tanak and neuville could both be world champions, its not always so easy.
Without loeb hirvonen would have been a big champion, without ogier neuville would have been 4 times chamion.
Just because you have the speed doesn't mean you win the title, there are lots of other variables.
No matter what some diehard fans here might think, tanaks pace is undoubtedly connected to the yaris. Just because he has dominant speed today because the hyundai of neuville and the citroen of ogier are slower, does not mean he will be dominant next year and beyond.
He deserves to be champion, but it's not always that easy.