Well, of course, it’s an Australian movie and naturally they feel protective of one of their own. It’s beautifully done. Bruce Beresford is one of my favorite directors.
First, it may have helped to bring about the peace conference. Second it taught the Australians to be cautious in their dealings with the mother country. And certainly, it also caused Australia to remove the power of the British Army to execute Australian citizens which probably saved lives directly and indirectly during the later world wars!
Edward Woodward portrayed Morant as believing this and acting heroically. Lord Kitchener believed no such thing. Years later he refused to attend some memorial occasion until a Morant marker was taken down. They did take it down for the duration of his visit and immediately put it back up after he left.