I half agree, people with no talent that seek fame, rarely get it - yet some do. But I can't imagine there's many famous people that didn't actively seek fame.
Seeking fame is normal, but fame as the goal was probably not the main goal for most celebs. A good actor wants to make good movies. If he is just in for the fame, he likely never can put the effort behind it, if he does not love acting in the first place.