Because anything a woman does generates a positive response. Competent? "Yaaaas slay queen #girlboss". Incompetent? "Awww she's so awkward and adorable #cute #relatable". Morally upstanding? "Patriarchy can't corrupt her! #neverthelessshepersisted". Morally reprehensible? "She's getting revenge on the christofascists #feminism #ourturn".

They literally cannot do anything wrong in a female supremacist society. So why not be evil? You won't get punished, you'll still be cheered on, and you get to do whatever you want. Be a permanent child. The system is set up to enable it.