Yep, don’t get what the problem is. If you don’t like the way Apple does things, you should buy something else. There are, apparently, Android tablets that will let you dick around with the guts as much as you want. Yeah, the build quality probably isn’t as good, and you might have to pay more for crappier hardware (or much less for much crappier hardware) but there are other tablets out there. Root 'em, install crashy beta software on 'em, go nuts.
Or, you could jailbreak your iDevice and do just about whatever you want with it. Technically savvy people seem to like doing this. It puts everything into a completely unsupported state, and probably is a huge security risk (considering that jailbreaking is voluntarily letting someone hack it) unless you really know what you’re doing, but you can do it. And Apple can’t stop you. They will, however, laugh and point if you expect them to fix anything wrong with it after you hack and bork it.
This basically comes down to the same disconnect there always is in these types of discussions: one group wants to do thing the way they want to do it, the other group looks at the desired end state and looks at what paths are established to reach that state. The first group is perennially frustrated, the second is frustrated only when they can’t find a good way to reach the goal state.
I have a friend who has spent a lot of time manually arranging his music files in nested folders. He was pissed when he imported stuff without unchecking the defaults and iTunes moved everything based on what tags were attached to the files (or in his case, misapplied or missing completely.) Me? I tag the damn things and let iTunes sort it out. I don’t even want to see the fucking file system. I’ve got 40 GB of music. I’m not about to spend the kind of time my friend did organizing all that shit. Filing, sorting, and retrieving information is what computers were made for. As long as I can find what I want and use it, I don’t care at all where it is.
Lately, I don’t even bother filing anything on OS X. I stole ideas from a couple of smart computer guys and use Tags (built on OpenMeta) to tag files, Hazel to move files automatically based on tags and other criteria, and Spotlight or Quicksilver to find everything. Takes me a few keystrokes and about 5 seconds to find and open anything on my computer. As far as I’m concerned, the file system isn’t even there. Couldn’t give a shit about where the files are.
IMO, besides the obvious reasons of sandboxing and security, Apple is trying to train people to get rid of thinking about the file system by not even allowing you to access it directly. I don’t think they’ve got everything worked out yet, so I’m definitely not going to say that there aren’t annoyances in iOS. But, there are very few things that I’ve tried to do that I absolutely can’t do. On the other hand, I’m a goal-oriented person, not a process-oriented one, so I don’t bang my head against the wall trying to do something that isn’t possible within the limitations of the platform.