I am a very strong supporter of feminism, but this kind of reasoning needs to stop.
The idea of "as a man you're biased from your position of power, therefore your opinion is invalid/worthless" means that the opinion of any men can be shut off automatically just by finding a gender twist on any debate. It's incredibly condescending, and frustrating, since any rebuttal you might try will be dismissed as your inability to see the other side, no matter how tenuous the connection to gender is. I would even go as far as to say that it's a mirror of the old "these are men things, as a woman you wouldn't understand" that was sadly common in the past.
While I'm very happy to see women empowered and their perspective being taken into account more and more, I'm also worried about the rise of any system that leads to the opinion of a group not being listened to. That is never good, period.
And to be clear, I'm not equating the current trend of dismissing male ideas to the suffering of women under patriarchic societies. Just pointing out a worrying development.