Because most players do not watch games day-in day-out like fans do. All they see is the rhetoric in the media, which cannot capture an amazing performance in words as well as it can 2 goals and an assist. It is in fact true, most of the players voting are naive; I wouldn't expect them to have the time to watch matches of other teams either.

Having said that, Chetri really should know better, considering he's a "pundit" on many shows. Let's face it - anybody who watches Messi and Ronaldo play would know there isn't even a comparison there.