Do you think it's impossible to find qualified women to fill 30% of place in power ? You could fill 50%, and even 100% of those with qualified women. Because no matter the gender, there will be qualified people to hire if you look for them with no bias. What's important here is to give more opportunites to women to work in key positions. To give them more representation and a say in how society should be shaped. Eventually, things will become balance in the future and no quota will be necessary.