I mean, if you think about it, a lot of the big horror trends do tend to tie into the anxieties of the wider culture at large.
The 80's had the big slasher movie boom. The 1970's and 1980's are seen as the golden age of serial killers in American history and the violent crime in general was through the roof in the 80's. It doesn't help that the MSM treated serial killers in a similar sensationalist way as they treat mass shooters nowadays.
The 90's was a time when horror was in a general decline in the US and the most successful examples tended to be stuff like Scream or Blair Witch Project, which both focused more on the horror that could happen in a normal everyday situation.
The 2000's had the big trends of remakes, "torture porn" like Saw and Hostel, and knock off J-Horror. In the wider culture of the 2000's, this was also when you had the anime boom and the "Cool Japan" movement, the fear of terrorism complete with things like Al Qaeda execution videos and the torture facilities at Abu Ghraib and Gitmo, and you first started seeing massive nostalgia for the 80's as Gen X started to fully dislodge the Baby Boomers from the wider pop culture landscape.
The 2010's focused mainly on zombies and demons/paranormal stuff. This was an era when apocalypticism and fear of societal collapse became mainstream (2012 Apocalypse, "preppers" entering the mainstream, climate change fears)
If the 2020's starts having a trend of mostly female monsters as an indirect result of MeToo, IdPol, the "Gender Wars" insanity, and the Woke Left in general, I would not be surprised.