We wrongly put our hope in some promise, belief, or wish that the person expresses, but ignore the clear reality of who they actually are. I don’t mean this in a negative or pejorative way at all, but in a reality-oriented way. The reality is that the person has not produced so far, and unless something changes, the future that you can expect is more of the past. Sorry or becoming committed does not make Jim Carrey a great golfer, or make Jack Nicklaus funny.