In my view, the scenarios he identifies are realistic although the defence under ABF s.48 probably applies to them.
The deeper point is this: the government is apparently intent on suppressing information about what is going on in Australia’s detention system. They have a lot to hide, and health workers know this better than most people.
Unfortunately, most Federal parliamentarians seem not to understand what they have just voted for. The Labor party supported the government on this one, and representatives on both sides point to the whistleblower legislation (the Public Interest Disclosure Act) to suppor their view that health workers can speak out. Apparently they did not read or understand section 48 of the Australian Border Force Act.