Narratives of male disposability come from men. Not women. Men are the ones obsessed with their value. It's just not something that's part of typical female thought. For us women, it's typically more about decoupling the "inherent value" societally ascribed to us (by men), because the narrative makes us little more than livestock. It's incredibly dehumanizing.
The point here is that for women to say thry don't need men is an attempt to decouple from that narrative that has been detrimental to women across the ages. It's nothing to do with men or male value. Never has been.
I don't think women reckoned on it hitting men as hard and, frankly, weirdly as it has for the simple reason that it's not part of typical female thought. We grasp toward what is a birth right to men as a means of saving ourselves, while men are ready to toss that birth right aside in order to be fitted for the harness of a mule, all for thr empty promise of a possible carrot somewhere down the road.
Men want to be harnessed and exploited. Women long to roam free from expectation or pointless valuations.