I did not like when Randy did "Randy's Playhouse" and wouldn't let anybody scream at the secret word and required him or her to bark instead. That was the naughtiest thing he ever did!
However, as for the plot of this episode, it does teach something. You should accept someone as a friend even whenever he or she cannot do you favors he or she typically does you. Therefore, Pee-Wee's real wish for Jambi to feel better was more appropriate than wishing to go to Paris.