Hang on a minute. This a prime hypothesis testing space! If you really think that anti-rape messaging makes post-rape experience worse, it surely follows that it must be worse for women than for men, this messaging being mostly aimed at women. So you can quite conveniently check your theory by comparing the incidence of ptsd, depression, etc in male and female rape survivors.

No need to keep this as a controversial suspicion or instinct, you'd be armed with real knowledge! Knowledge you can report back to us, and anyone else you may have discussed this issue with. Indeed I think you could cultivate a useful reputation for open mindedness and rationality if you went back to any place you'd seen this attitude expressed before, and shared your findings -positive or negative- with them.