I think Manu was hurt in the voting due to be outed with injury for a period of time.
I remember watching the Sunday footy show a few weeks ago and Phil Gould and Andrew Johns (both men that I respect immensely) talked about how having someone in your team with a massive tackle count is nothing to be proud of and if the coach is proud then he's not doing his job properly. They said, and they're 100% correct, that the teams with these players in never win premierships. Nathan Friend has been up there with Michael Luck the past couple years and the Titans never even made the finals.
So in other words, making 1000 tackles a year is nothing to be proud of Michael. It just drives home the fact that the team is not working together as a unit. Nobody should be making 1000 tackles. Alan Tongue is up there too every year, when was the last time the Raiders won the big one?