It's not victim-blaming to encourage people to minimise their chances of being raped/attacked/taken advantage of in any other way. It's being realistic, and recognising that while we can hope of a world one day where people who commit crimes don't exist, that world is not the one we currently inhabit. Of course, if someone hears of a woman in revealing clothing getting raped and says "Well she should have dresses more modestly", then of course that is victim-blaming, and is abhorrent.