Someone to be Happy for You

So, I had a conversation with this 6-year-old girl on the NY subway. She asked me what was drawn on my bag, and what was in it, and who I was. And I told her that I am a student, and study biology, but I also want to write books for little kids; and how important it is to have a wish and work hard to try to make it come true, and had a laugh about it. Then she asked me if I would be happy if my wish came true, and I said, "Yes." And she asked if my parents would be happy for me if my wish came true, and I said, "I hope so." She thought for a moment, and replied, "A wish coming true is not that cool if there's noone to be happy for you." At that I lost my capacity of speech.