Saying, "I told you so," isn't nearly as much fun when you have to clean up the mess. It's always the smart guy that ends up paying the price when the dumb guy / management screw up. Who stays late and fixes the code / saves the server when things break? The guy that knows what he's doing. He may feel like a hero afterward but mostly he just feels pissed off that he had to do it at all.
I can't count the number of times I've wondered why I'm in a meeting or why I've been consulted at all. If you aren't going to respect my opinion, you needn't bother asking. It only makes it that much more depressing when I have to clean up your mess later without so much as a, "yeah, I guess you were right."