Curiosity is not something you are born with, yes. It's influenced by the experiences you have. I don't think iPhones allow for the experiences that push kids to want to hack things. It is pretty much a sealed environment where all details about how the computer works is hidden behind some app. Even access to the filesystem (iirc from my 2014 experience) is hidden away (like being unable to access your picture files except through the gallery app). That kind of environment stiffles curiosity imo.