I think there are a couple of reasons. I think primarily it's because women do tend to take on a lot of the non-kinetic roles, so the things like attacks tend to be perpetrated more by men, although that is not exclusively the case. We see plenty of examples in many different contexts. Their roles in things like being financiers or in logistics do not tend to get the splashy media coverage.
I also think there is still some bias in media reporting and perhaps in law enforcement and security services with respect to seeing women as a threat.