I assume harassment would not happen in the open source world since you can use an alias to hide yourself, however, why is the portion of female contributors s

I assume harassment would not happen in the open source world since you can use an alias to hide yourself, however, why is the portion of female contributors so low? Tech blog writers, people don't read blogs because it is written by a man, why is there so much less programming blogger that are female? I felt the discrimination that is happening is the result, but not the cause of female leaving the industry