It is not sexist to observe that, in many or most societies on Earth, men and women are systematically treated differently in many social and professional contexts. Nor is it "perpetuating a gender bias" to posit that some of this difference in experiences between the genders may cause one group to be more affected by some societal pressures than the other.

I'm not saying it is one way or the other. Regardless, playing the sexism/bias card here is overreacting: you have one hypothesis, OP has another, neither of you has presented any evidence or argument. Larry David doesn't count.