I am thinking more like this: I am a scaredy-cat about roller coasters. So I prefer the tea cups to big thunder mountain rail road. And I maintain that preference after choosing the Tea Cups (I don't regret my decision). However, had I ridden Big Thunder Mountain Rail Road, I would have been able to appreciate that it is awesome, and would have preferred Big Thunder Mountain Rail Road to the Tea Cups.

Since this case seems pretty possible, if the sorts of lessons you are going to draw only apply to hyper-idealized agents who know all their preferences perfectly and whose preferences are stable over time, that is a good thing to note, since the lessons may not apply to those of us with dynamic preference sets.