Why can't you send her out when you teach him properly??

I'm not up for any controversy and discussion. I know you people have very good stories piled up to shoot them out on me. Parents are ready to send their sons out while locking up their daughters saying that someone's son might become threat to her.
But don't they that sending their son out might become threat to someone else's daughter??
Why do they always tell a girl to dress properly but not their son to behave properly?
Also a brother is not fine with his sister talking to other boys but he is always ready to go out with someone's sister.

We want two way switches to lead a comfortable life. But not ready to look at the things the other way around to find a solution.

Isn't it much better if all the boys are confined to houses at night and let the girls roam so that they are not afraid of male bugs and enjoy the night view??