Diversity is highly subjective, it can be sliced many ways. While a room of people might be the all the same gender and colour, it may actually be very diverse in catagories such as rich, poor, different country background, education levels, Christian, Jewish etc etc etc. Meanwhile and multi coloured 50/50 male female room might be all uni educated upper middle class urbanites from one country and hence deceptively much less diversified.
Anyway, the LNP is not "diverse", but the outwardly "diverse" ALP might not be as diverse as the appearance.
