> Doesn't help when you have to share data with companies and governments, and the information ends up on someone else's disk.
FDE was an example among a vast array of encryption products. Attacking an non-comprehensive example as non-comprehensive isn't very enlightening. I still fail to see which DRM product you are suggesting is the proper tool for this situation. Even further, cryptography and careful allocation of trust seem to be a better solution than DRM for disseminating sensitive information since DRM is generally only a barrier, and not robust against concerted attack.
That is to say, if you are disseminating information to untrustworthy sources via DRM, then in the great majority of cases, you can consider the information compromised. Most DRMed content is copyable with as simple a solution as recording your screen. Even HDCP can be defeated with a simple camcorder.