The problem with players is that, I'd bet you they don't watch as much basketball aside of what they need to prepare for an opponent any given night, and some of the playoffs.
I think it's too heavily influenced in the 1-4 meetings you may have with a team any given year, rather than how a player performed as a whole during the season.
Just my 2 cents on why players aren't the ideal candidates to a voting process, whether I like this award or not aside.