CP's Biggest Myths' Mastermind

Recently on twitter, a user asked previous Club Penguin worker, Rocketsnail on Twitter about Rockhopper Island and the Iceberg myth. As many of you know, these are two of the biggest myths of Club Penguin, so the community was highly interested in his response. Rocketsnail responded:

This means that these myths originally came from one of Club Penguin's previous ideas, that were never discovered and/or put into action. Do you think that was a mistake? Or is it good that they kept it an interesting myth? What do you think? Comment down below!