I'd wager it's because faaaar too much focus is placed on #2, and relatively little on #1 when it comes to rape discussions in general. So repeating #2 for the millionth time comes off as a bit patronizing (especially when there's little evidence that focusing on #2 actually solves the core problem). A couple other examples of how this phenomenon manifests itself in other areas:
The "don't walk into a bad neighborhood due to crime" advice has been brought up a couple times, and how we consider that acceptable. In the abstract, sure, that's well-meaning advice, but if 90% of the discussion is focused on "avoid bad neighborhoods!", with 10% of the discussion focusing on addressing poverty, mental illness, drug policy, etc., that displays a severe lack of prioritization. It lends credence to the idea of sweeping the problem under the rug and hoping for the best, as opposed to addressing it directly (especially, again, if it ends up being the majority of the discussion).
Another example is when people talk about the economy. A lot of focus sometimes gets placed on "hey, things are tough, so you gotta hustle to make it! Here's what you can do! Work 3 jobs! Go to school! Bootstraps!" Which, again, is good advice in the abstract ("why would anyone be opposed to working hard?"), but all too often, it shows a tacit acceptance of the idea that "bad economy with no jobs" is some natural way of the world with no way to solve it, so we should just suck it up and deal with it by working 3 jobs. But when the discussion focuses on this, it often ends up serving as a distraction for solving the real core issues (for example, specific policies that have been put in place that have led to a bad economy). So instead of people, say, arguing and voting to change those policies that have been put in place (which would actually solve the real problem), this weird sense of nihilism takes hold ("everything is fucked, so I'll just do what I can to make it!")
Essentially, people are tired of focusing on "symptoms" and realize that if you're really genuinely interested in solving the problem, the vast majority of resources, discussion, and advice should be focused on the "disease". Repeating the same symptom treating advice over and over does nothing to actually get to the core of the issue, and is ultimately like trying to use a band-aid on a hemophiliac.
(It can come off as
Concern trolling as well)