How big is your sample set? I've worked closely with a significant number of extremely successful (financially and professionaly) folks in a range of positions - I could NEVER make such a statement. Some of the successful ones I know are driven by fear of failure, the need to be the best at any cost, the need to demonstrate to themselves their own ability in whatever field, fear of poverty, the desire to please an audience/family member, the desire to 'do good, etc. I'm not saying all of them hate their jobs - I'm saying depending on an essentially transient 'emotion' to select a career makes as much sense as doing the same for a life partner.
My sample set is fairly large and over a large segment, say from cops to wall street types. I'm not saying they go around like grinning idiots or that they are not driven by inner demons, but they do love their jobs and can't imagine another life.
It's always the less successful, people who hate their jobs you find spouting the "woulda, coulda, shoulda" lines.