Possibly, but I disagree with your conclusion. Just because the legal lopsidedness is partially determined by biology doesn't mean that the government should be powerless try to address the resulting inequality. As one example, consider people with disabilities. Their difficulties are the result of biology, and yet pretty much everybody is comfortable with the government mandating that reasonable concessions be made (wheelchair ramps, elevators, accessible bathrooms, handicapped parking spaces, accomodations in the workplace, etc.). Accidents of biology do not prevent the government from trying to level the playing field in other areas, so I don't think that's a fatal objection here.