There is a risk that we, as technologists, may become drunken with the power that knowledge gives us over the non-technical folk. They look to us for answers because we have the Dilbert Knack, and they trust us to really know.
And just when we fall through the rabbit hole of illusion that such power creates, when we have decided that we are gods, knowing and seeing all, those pesky humans, mere mortals they, go off and make a business-driven decision that runs contrary to every tenet of elegant design and best practices that we have graciously delivered to them at great sacrifice to ourselves on digital tablets for their own good because they cannot possibly know what is good for themselves.
Our ego blinds us to the truth. We are not gods. And when the business people reject our ideas, only humility will prevent us from making complete fools of ourselves.
Indeed, we can only be truly effective when we come to understand that we serve at the pleasure of our employer, and we want to serve their interests but understand our place as a servant. We can gently persuade. We can teach. And we can be there when things go south, having the wisdom to never say, "See. I told you so."