I think this is merely an attempt to highlight the fact that victims of rape have been systematically not believed and probably come from victim support groups. Like many things it's a way to bend the stick in the other direction. I have always translated it as "Take victims seriously" no matter how hard some people online have tried to act scandalized and tell me that it means "Believe blindly what a victim says"

I guess the reasons why the word of victims is generally put in doubt is combination of factors ranging from a lack of empathy from men that identify more with a potentially falsely accused man than a a woman victim of rape to denial because it's uncomfortable especially with happens inside a family (way more common that the rape in a dark parking lot at night trope) where people have ties to the abuser and may even like him.