Go to Woolwich town centre, or Sham town centre, there are gangs of young women roaming the same. They may insult young, or older men, but they will not usually attack them.
They will attack females.
Quite possibly - I wouldn't know. But in the context of the thought experiment I decided after some thought that I would not feel safe if men had a 9pm curfew. Possibly this would not have been the case many, many years ago, but these days I just don't trust female criminals to not attack me.
But I think I might have a better fighting chance if a woman attacked me, compared to a man so I can sort of see what the thought experiment is getting at, even if it was expressed in a clumsy way and did not seem to make the point that while the risk of attack may be reduced, it is certainly not eliminated, and women will continue to have to take steps to safeguard against becoming victims of violence from other women after 9pm.