One evil , sexism, should not be a moral justification for another evil, exploiting other people.
Besides, sexism got much better, though it might not be gone completely yet and hopefully it will be gone completely one day.
Society just needs a few decades to abandon something so deeply entrenched completely. A lot of people have been raised to believe that women are inferior or that women should be responsible for the house and children while the men works.These people will not change their believes anymore, so it will take some time until that chnages.
But as long as women exploit men , a lot of men will use this as justification to talk bad about women or treat them badly.
So should the goal not be to abolish both?