Why the obsession with strikeouts?

I've noticed in all the Adam Dunn talk that many people complain about his strikeouts. Why does this matter so much? He has the same career OBP as Ichiro, who is considered a hitting machine. Would you rather he hit a grounder or popout? You can argue about "productive outs," but that's never been proven as a valid argument. And for the record, four of the top 10 in Ks all-time are Hall of Famers, with Jim Thome likely to be the fifth.....so why the big deal?