Oh but it is. As you all know full well I am firmly planted in the Apple camp, but the thing I most dislike about the Apple environment is the problem of getting files to and from my iDevices. Woe betide you if you need to add a couple of photos to an iPad that are not part of a synced iPhoto library. Or if you want to get an audio book onto your wife's iPhone which is synced with a different library. In the latter case it is necessary to erase the entire music collection to add an audio book ! Why ? It's fine if you don't stray from the tightly coupled libraries on the PC/Mac sync'ed to equivalent libraries on the iDevice, but not if you want to do anything slightly ad hoc.
Cannot comment on audio books but I copy photos between my iPad and NAS drive all the time.