The fact that something in the past couldn't have been prevented doesn't mean that there's nothing to be done in the present.

There's also the fact that often you couldn't have prevented it.

It can be made less likely. It's the victim mindset that makes the victim believe it can't be prevented, which in turn prevents the person in question from making changes that will prevent problems in the future.

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.

Being a victim is what reaction a person takes to events. If they believe that nothing could have been done, then they believe they are powerless.

This doesn't make sense - often times we are powerless. No amount of "not being a victim" is going to bring back your husband who died in a car accident, or a soldier who died in war, nor is being a victim either.