The difficulty that you're having wrapping your brain around the concept of empathy is good evidence that that assumption should not be made for conference attendees.
That said, these policies are not even about you. They're there so that people who might be victims of harassment can feel safe in the knowledge that there are procedures in place for addressing it in the rare event that it occurs, and that conference organizers will take it seriously. That benefits everybody too. Don't assume you will never be harassed. I'm a straight white male and I have been made to feel unsafe and uncomfortable before by another person, at PyCon even. I'm not an emotionally fragile glass doll that you and others in this thread seem to be strawmanning. It really doesn't take much to be made to feel unsafe by another person's behavior. If you've never experienced that yourself it's because you simply aren't as likely to as other people.
In my case it was minor enough, and I felt in enough control that it wasn't worth reporting. But I'm glad to know I could have done something about it had things escalated.