No, it isn't. It's called understanding that actual causality is complicated and doesn't ever rest on a single factor. In fact, one of the major things you will learn if you study a lot of psychology at the college level is that the majority of human behavior is explained by environmental or situational factors over individual factors. Our professor called it the 70-30 rule, as loosely, 70% of human behavior is environmental and only 30% of it is personality or individual. We spent a lot of time going over example upon example of this because Americans in particular really, really overestimate how much personality or the individual matters. At no point was this cast as not "taking responsibility" but as actually bothering to understand the real world and its complexity. Hell, if anything, understanding the complexity is about actually taking responsibility appropriately and not piling everything onto one thing. Causality is complicated. Victim blaming is stupid for that reason if no other. Never mind it is utterly heartless and is a diagnostic red flag for anti-social personality disorder.