But why always this direction? I don't say the other games are better. But why justify an unbalance only because other games don't do it better?

This is a well-known picture that explains the problem you're encountering.
We are not starting with a level playing field. Or, to use the picture here, we are not all starting from the same height. In this case, men are taller. Men have been given greater representation, and for the most part still are given it. In order to make things more equitable, or in fact to bring justice to the situation, we need to give women more of a helping hand than men. Because they - using this analogy - are shorter, and giving the same to men and women will not produce a fair outcome for women.
Bob has 3 apples.
Jenny has 0 apples.
Jenny says that Bob and Jenny should be treated equally.
Bob says he has no real problem with that.
Bob and Jenny each take 3 apples from a basket.
Now Bob has 6 apples, and Jenny has 3 apples.
Wait, says Jenny. I still have fewer apples. We should be treated equally.
Bob agrees, we should be treated equally. And we have both taken 3 apples. That is fair.
Jenny disagrees. Jenny reaches and takes 3 more apples.
Bob has 6 apples.
Jenny has 6 apples.
Bob throws a fit because Jenny took more apples than him and he doesn't think that's fair.
See?