Bullshit. Tell them that there will always be someone better than you, and you have to work twice as hard to keep up. Determination and practice will make you a better player and person in the long run.
Everyone is such a cry baby today when their kids get beat at something. It's a learning experience, and these parents aren't teaching their kids jack-squat!
When my cousin was 13 he was throwing 70mph+. No one complained about his skill.