But that assumption comes with the corollary that safer spaces are somehow less permeable—that the only work we need to do is to know the bad actors, and make sure they cannot enter—and that if that fails, the space is unsafe and should move to a state of safety.
The latter fact is still true—the space is unsafe and should move to a state of safety—but the former is dangerous, because it makes safety a binary assumption that is based on factors of awareness we often do not have at the moment an incident takes place.