Right, but it is important to understand the origin of those differences.
They could be prohibition, straight discrimination, social stigma, culture or personal preference. And these are usually linked together and evolve over time. Once prohibition is abolished, discrimination begins. Once discrimination is abolished, social stigma remains… It’s like decaying radioactive elements.
But yeha, if there are 10% female directors and 10% of the winners were female, sounds like there’s no discrimination there. Anyways, even if percentages don’t match it’s important to go in and check if the decisions were fair. What if the 10% of female directors are really really bad for the movies released that year?
Too many variables. Things like these require statistical analysis, social analysis, artistic analysis… Pretty complex. I don’t know.