[roguecoder]

Because oppression hurts real people, with real consequences. Any argument that will be used to deny people equal rights and justify mistreatment of them requires extraordinary evidence, because otherwise we end up at eugenics.

These discussions aren't theoretical; to pretend they are is actively harmful.

[yummyfajitas]

Your entire post is a logical fallacy: http://en.wikipedia.org/wiki/Appeal_to_consequences

Further, it's not even a correct use of the Appeal to Consequences fallacy. If the natural causes hypothesis is true, it does not logically follow that anyone should be oppressed.

It does, however, logically follow from the "natural causes" hypothesis that you can't have both equal rights and equal proportions (i.e., either you discriminate against men, or you have fewer women).