Most people create a pixel worlds account and can't be bothered to backup their account. Then when they forget their password, they go to an administrator or moderator for help. Sadly, they can't be helped as they have no proof that account is theirs, then their account is lost forever.
So some people may think that backing up their account is a waste of time but it can also help you get your account back if you have forgotten your password. Make sure to ALWAYS backup your account