This was someone or a small group inside the border force who didn't have a clue what they were doing, cocked up, tried to make a big showy scene of things, and then scrambled to save face after the actual experts clued them in that a) what he had was safe and b) was 100% legal to own. (note that he was prosecuted for something that the border force allowed through years before the sample they erroneously thought was a problem, and that was not illegal to own, only illegal under a very twisted interpretation of an obscure law to import).
They asked the ordinary courier (without hazmat gear) to deliver it in person to help build a stronger case.
Details: https://www.youtube.com/watch?v=M0JGsSxBd2I
The hazmat crew was literally manufactured drama for a prosecutor (who somehow continues not to be named in this ridiculous case) to build a better case.
Sally Dowling SC - Director of Public Prosecutions New South Whales
Frank Veltro SC - Deputy Director of Public Prosecutions New South Whales
Helen Roberts SC - Deputy Director of Public Prosecutions New South Whales
Ken McKay SC BAB - Senior Crown Prosecutor New South Whales
Craig Hyland - Solicitor for Public Prosecutions New South Whales
Anne Whitehead - Deputy Solicitor for Public Prosecutions (Legal) New South Whales
Esther Kwiet - Deputy Solicitor for Public Prosecutions (Legal Operations) - New South Whales
Natalie Weekes - Deputy Solicitor for Public Prosecutions (Operations) New South Whales
Deborah Hocking - Deputy Solicitor for Public Prosecutions (Operations) New South Whales
Joanna Croker - Deputy Solicitor for Public Prosecutions (Operations) New South Whales
https://www.odpp.nsw.gov.au/about-us/leadership-team
The current head of Fire and Rescue NSW is Jeremy Fewtrell.
The question is did the authorities know that the materials were harmless in advance, or only after they acquired them?