Do you really believe that no one (authorities/early btc developers) knows who the real Satoshi Nakamoto is?

Something that has always puzzled me is, how someone important like him could just disappear like that. Bitcoin has become a big deal now, still no one knows anything about the creator. In today's time, when technology is so advanced and someone who has created something that has become such a headache for so many poeple, still they couldn't find that person, idk why I just can't digest that..

Or they know everything and have hidden it from public intentionally. If that's the case, why would they hide it? I mean what's the benefit here?