Men bad

Every time there’s a shooting announced, it’s always a male shooter. I did some reading and found that according to the FBI, only 9 of 250 mass shootings in the US from 2000 to 2017 involved a female shooter, even though they make up 50% of the population. From social media posts I’ve seen shared it seems there are many women who are into the 2A open carry gun crazy culture that exists in the US, why aren’t there more females that commit gun crimes? Is it related somehow to the psychological differences in men vs. women?