Access to what? A device he already owns.
Access to devices people already own... Where is the theft? It's a potential, unproven intervening act - there are plenty of reasons you would want to do it. It's a generalised argument because all he's doing is explaining how to get system level access to a device you already own.
In my view, this argument is clearly a constitutional issue. Is a gun shop an accessory to a murder? Is a telephone manufacturer an accessory to a terrorist attack organised over a phone?
An 'accessory' implies a particular participant, not a generalised one. One thing that's incredibly important in this case is the fact that his exploit was the ability to use the device for a purpose other than what it was intended. It was not deisgned to circumvent copyright laws.
The entire purpose of the constitution is to protect the rights of the individual!
How is the shutting down of the PSN relevant?
Different exemptions for different professions in general. For example, as a systems admin, the DPA (data protection act) in the UK allowed me to view all private records in a social services database, because I had to see records to fix them, while social workers had access restricted only to appropriate cases. Vets can cut open animals with knives, while I ... I would be severely prosecuted...