I'm one of those bullet proof aussies that believe it won't happen to me.
However that roof space and what I can only assume is asbestos, by what I can see, is a bit scary...
We all see the "panicked" threads here and most times I don't get the concern as it's only dangerous if it's broken or not painted/sealed.
Just about all you have is broken, and none of it is painted.
Once you have confirmed it's asbestos it'd be my priority to get it gone...