I agree. I don't think the cruise analogy was brought up as a full analogy to the experience, but rather as simply a response to the people who are super-tightly focused on the supposed lack of access to the outside world.
I too wonder how the visit to Batuu will be handled from the immersive aspect.
How did the idea of "no contact with the outside world" come up? In particular, did someone in the thread turn the idea of "try not to break immersion in public areas" into a "stay at a rehab facility" level of curfew and proscription.
I mean, they're not going to actively control private activity in your stateroom, right? And the hotel will not be a SCIF either.
I could see them selling themed cases for your iPhone and Android phones, though.