I think, at base, it's this: we are at a time when mainstream economists are predicting, within 1-2 generations, 40-50% unemployment in the developed nations, due to automation and global.outsourcong of labour.
The early tremors if that massive change are already happening. In the past, economic threat to men's ability to work has always meant shoving women out of the public sphere.
Both men on the left and men on the right are going to side with themselves against women. We're in a pincer squeeze: the right wants us back in the home, the left wants us in a brothel.
Genderism in one fell swoop, if encoded into law, curtails our ability to challenge that -- esp in the US where women don't actually have Constitutiinal protection as equal citizens spelled out. By some interpretations, on that basis, TW already have more rights in the US than women: as males, they are guaranteed equal protection under the 14th Amendment.
Women collude in this for all the reasons some women have always aligned themselves with (male) power. There are clear benefits to doing so.