Because all the smart people are smart enough to see how much of a soul-sucking cluster-fuck politics is. That, and one could argue that if they're put on this earth to live a life of happiness, how could one ever possibly achieve this through a life in politics, knowing what they are getting themselves into?
Ehhh, that's a hand-wringing, self-serving generalization.
"We have the answers. We're just not soulless enough to want to go through (and perhaps change, in the process) the effort to supply them and make them help."
