Because of the high attrition rate for women working in tech, teaching more girls and women to code is not enough to solve this problem. Because of the above well-documented differences in how men and women are perceived, training women to negotiate better and be more assertive is also not enough to solve this problem. Female voices are perceived as less logical and less persuasive than male voices. Women are perceived negatively for being too assertive. If tech culture is going to change, everyone needs to change, especially men and most especially leaders.