Great work. With strong arguments like that you're sure to discredit fascism and advance feminism! You are as asset to the conservative PsyOps machine, comrade!
His primary argument was all about lifetime earning potential. That is not what salary refers to. So, his argument doesn't actually apply to the allegation. Therefore, it is specious.
I can't see where his argument was about lifetime earning potential. Seems to be just simply women with children make less money, which seems reasonable.
I also don't see anywhere he even implied that salary and lifetime earning potential were the same thing. And salary would be reflected in lifetime earning potential.
What is your position? I'm not even certain what the point of your disagreement is.