The male-to-female ratio at 1500 elo is not 90:1, but more like 9:1. 10% is a visible minority.
But I see where our disagreement is. You think there ought to be more women in chess. I think different people can do different things, so women don't need to match men in every statistic and vice versa. If we open it up to universal participation and it turns out to be a male-dominated game, then let it be. I don't think there's anything wrong with that.