Well Martha is imaginary.
That’s the difference. I have never used imaginary men to discredit the experience of real men. He can construct Martha any way he likes in his head. Maybe if he wants me to feel really sorry for him and Martha is in fact a rock! The point is that he invented her and I was making a joke about that.
I cannot say that no feminist would say something nutty to you. We aren’t all meeting on the weekends and some people are just mean. But in this circumstance, I am going to say that imagining a person who has idealized experiences is not a particularly logical response to descriptions of sexism experienced by real people.