Why stop there? Why not just stop worrying about files and folders, and just think about documents, pictures and videos instead? Why should I have to care about the low-level filesystem at all?
Which was a nice experiment which proved that it didn't work. You know what you can't do on iOS which most users want to be able to do?
Yeah. Work with the same document from multiple viewpoints, or applications. You can't work with documents across applications on iOS because you supposedly don't have files.
Like I said: A nice experiment, but it proves that "no files" only works for the simplest of use-cases and limits the ability to work with data beyond the limits that people reasonably expect to find.
Because that paradigm is currently restricted to rich people in first-world countries where always-on fast internet is ubiquitous and you can sync everything to the cloud without much trouble. The rest of us will continue using not-very-high-capacity USB sticks to move photos, videos and other data around for the foreseeable future.
Cue iOS.