In Australia they usually never bothered authoring multiple versions of most 'standard' issue movies on DVD. They only
released the widescreen versions. I can only recall a few exceptions where two versions were released (for example the first Harry Potter movie was definitely released in both fullscreen and widescreen versions back in the day). But for the most part, the studios seemed to decide that the Australian buying public would simply accept the black bars as "preserving the original aspect ratio".
Or maybe they just figured it was cheaper than having to press two different versions of the same product?