The argument here is that the protocol itself is independent and can run on the internet like bittorrent, IRC, SMTP, XMPP etc. This is not about the physical laws and resources governing the internet.
The protocol cannot be separated from the physical infrastructure required to carry it out. Until Bitcoin separates from the internet itself and shows it can actually fund the infrastructure required to maintain it... don't see what the pull is.
The point being, of course, that it's gotten fairly difficult. It's all very well and good to treat the Internet as an abstraction, but those "physical laws and resources" are critically important for any service that wants to be useful in the real world -- where physical laws and resources are very important.