Because if you had no role in the matter, you couldn't have prevented it.
There's also the fact that often you couldn't have prevented it.
Chicago cops frisking you all the time -- wear skin tight pants.
Car accident -- use defensive driving techniques.
Being shot and killed for sleeping at a Wendy's -- don't resist arrest.
Wife divorced you, took your house and kids -- don't get married, OR, learn to discriminate.
Sexist manager won't promote you -- join a company run by females, OR, start your own company.
Pandemic -- move to the country.
On the other hand, if you prefer not to solve your problems yourself, you can say "Why should I change, when other people are the ones doing something wrong", fold your arms, and wait for a man to solve your problem for you.
For example: If I'm the victim of a crime, the first step to reporting the crime is acknowledging that fact. Certain categories of criminals (con artists and sexual abusers) rely on the fact that victims are often reluctant to acknowledge their victimhood, even to themselves. This allows those individuals' behavior to go unreported so they can prey on more people.