Plus-minus is not a defensive stat. Look at defensive stats, like rebounding, and you'll notice he's a career subpar rebounder. If you actually watch the games, you will know he can't handle big, long guys. And in some cases, his defense is ridiculous. Where were you when Okur was driving right around him and straight into the paint?. You're just mesmerized by his offense, and basically ignore everything else. You also have very short selective memory. Matt Bonner is what it is. When he's on offensively, he'll give you a boost and relieve pressure on scoring the ball. When he's not on, he needs to sit down ASAP.