Are you suggesting people shouldn't be conscious of risks, sexual or otherwise, when venturing out into the world? I'm just trying to offer some pragmatic advice. The world can be a scary place. It's wise to exercise a reasonable degree of caution. I fail to see how that could be considered remotely offensive, unless one were deliberately trying very hard to be offended. Which I think a lot of posters routinely do.
I think part of the objection is that whether or not a woman gets raped has very little to do with her clothing, so it's not useful advice anyway.