Which is all well and good if you were privileged enough, even in the United States, to have an education that gave you even basic information about reproduction, sex, and HIV. Let's not overestimate the number of informed, sexually active people out there.
We live in a society whose government has ONLY supported a curriculum of complete ignorance for our soon-to-be active kids for the past 8 year if not longer which may even continue on for a few more years. Communities who are rich enough to be able to prioritize truthful sexual health education have the luxury of turning away funding for the government, but poorer communities need that government support to keep their schools open at all, and to get it, they have to agree not to even discuss condoms EXCEPT for if they want to talk about how often condoms fail. And the cherry on top of that is that the government curriculum has NO way of controlling the level of misinformation for contraceptive "failure rates."
If you happen to be part of the lucky ones who got all that information, had supportive communities or access to people who reiterated that information, or even had the time to prioritize that education over the daily struggle to feel safe at home or put food on the table, then you have NO excuse as far as information is concerned.
But when we talk about people, victims, we can NEVER assume that they were just too lazy and stupid to ask to use a condom or to put one on. That already assumes an entire world of things about their relationship, the socio-political dynamics of their lives, their cultural background, and their level of access to what should (key word there being "should") be open information.