Ask this fire inspector for a copy of the regulations that require the removal of door chains. Just 1 incident involving a door chain would not require the removal of ALL door chains throughout Oz.
Their is always a balance between security and fire safety, and if you remove all locks from all doors you can then have unimpeded exit in case of fire but your chances of continuing to live their without being burgled or assaulted is slim.
Tell the Inspection company that you want a different inspector next time unless he produces the regulations that he claims you are breaching.