Well yeah, but that still doesn't fix how easy it is to wipe out the save file. It only prevents little ones from running the game when not logged in as a parent, or not already running the game. I've got small kids, and this is the only game I've experienced data loss on save games simply due to the ease of erasing the game. Other games make you at least go through a couple different menu screens.
In my case, it's the 6yr old. Old enough to navigate through menus by recognition, but they don't really have any comprehension of the words in the menus.