Woosh, there goes the point flying over your head.
The point being the difference between an Opal card valid ticket and an NFC paid valid ticket. The mechanism is exactly the same; the only difference is the the Sydney transport network adhering to the old fashioned requirement to have the whole ticket, which proves nothing. I see that they are catching up with a contactless trial (although they don't do daily/weekly fare capping like TfL do)
So if Mr Cyborg had had a NFC induction loop embedded in his skin and had been travelling on the light rail or ferries, he'd have been totally legal.