I've always been against female space marines as it bas always been clear the emperor used some of his dna to create the primarchs, and the primarch dna was used to create the marines.
Anyway, SoBs have powers even marines don't have. They can commit miracles of faith ,when they get killed they get miracle points that make the survirors more effective.
But yes, the wokefems have been told they can't have female space marines so they will raise the rainbow banners and wage shrieking screaming war until they get what they want. They are determined to force their way on gamers and wonder why they are hated.
I say no female marines, ever.