>>1641699actually, since the second-class rank of women troughout history roots from their physical weakness, all social injustice against women is also technically "based" on that.
So you're right, women earn less because they are physically weaker, either way around.
But I'd disagree on the intelligence bit, chess for women is just sjw bullshit, the same register as LEGO for girls and boys separately, it's just gay fagshit propaganda.