I think you are probably the most correct of all the posts here. Apple wants a system where you can't access the filesystem period, at least not by default. Seeing that there is a filesystem underneath the system is, to their eye, as appealing as those devices popular in the 90s with transparent shells that let you see the electronics. Their ideal future is basically the iPhone. They even said as much in their unveiling of the new Macbook. They said the phone/tablet will be your primary computing device and a laptop or desktop will just be an accessory (eventually literally, as mobile chips get more powerful and Intel continues to nerf desktop offerings).
In the meantime, if, like me, you are stuck on OS X because it's the best GUI for a *nix now and in the foreseeable future, I suggest buying PathFinder (http://www.cocoatech.com/pathfinder/) to bridge the gap. It's certainly a much better tool than Finder or Windows Explorer.