Why is this? If enough people follow the "work with people that are SMARTER than you", which I think it's really important and I hope a significant number of people follow, why wouldn't they like working with you?
In other terms, you have cognitive biases, emotional biases, and filters your brain uses as information you process goes from perception to short term memory to long term memory...and lots of things get lost in the process.
If someone isn't smart enough to realize his perception of what he knows is colored and influeneced by things outside his control...he probably hasnt had even close to enough experience to be humbled.
Don't be that guy!
You can of course be super smart at your job and know a TON, but when you start acting cocky and like you know everything it usually doesn't end well.
However in my experience, the majority of people with a know-it-all attitude are simply blowing hot air and trying to cover for the fact that they really aren't nearly as smart or knowledgeable as they would like to be.
Most truly smart and knowledgeable people I've met have been amazingly humble and usually fairly quiet about things. The qualities of quietness and humility lead to learning.