I think we also need to recognize that part of this is the result of a gradual change in the basketball landscape over the last several years.
The reality is that conventional centers are just not where the game is. The emphasis is on fluidity and athleticism. Players that easily project to the NBA and are going to garner media attention and endorsements, and therefore are going to get the majority of the focus on the part of voters.
There was a time where it was a surprise if a center didn't receive the major awards - Mikan, Russell, Chamberlain, Jabbar, Walton, etc. It's much more of an uphill battle now.