There's no need for any discussion. It's clearly documented by dozens of drivers as impassable without 4x4, some of their vehicles have incurred thousands in damage attempting to use it. AWD have been stuck needing roadside assist. People try calling 000 for help but have no service. "Paved sections" don't make it secondary. It isn't a routing issue, it isn't tagged properly, just because some people like driving it sometimes and are offended it's called a track or goat path.

https://www.tripadvisor.com/ShowUserReviews-g255098-d602483-r873715658-The_Barry_Way-Victoria.html