Oh yeah, I agree. It's just that if you know a guy has a hamate bone injury, you should be taking scouting reports with a HUGE grain of salt before you report on them. He should know that.
I mean, everyone thought Ryan Zimmerman was no longer a franchise talent in 2008 after breaking his hamate bone in late 2007 when he went down to a .774 OPS and looked like he was losing whatever power he had (30 points less ISO than the year before). Of course, then 2009 rolls around and he bumps his ISO up 70 points, which he maintained into this year. For Ryan, he hit a lot more grounders the year he had the hamate bone. For Norris it seems to be an inability to square up the ball and hit line drives, forcing his average down.
Point being, maybe that injury just changes the way your hands feel enough to mess up your swing for a year.