Useless thinking. Just think of what would happen to your siste rif she was raped and her only family was her grandma and she did not have any friends. Oh it would be the neighborhood crew saving her? That's police.
Rapes happen in peoples' homes where there are no police. Then, if the victim chooses to report it, they are often blown off by the police entirely unless the circumstances make it impossible to ignore.
https://www.startribune.com/ignoring-rape-complaints-when-po...
https://www.focusforhealth.org/women-across-the-us-suing-pol...
https://www.cnn.com/interactive/2018/11/investigates/police-...
https://ilr.law.uiowa.edu/print/volume-99-issue-3/how-to-lie...
And that's really just the tip of the iceberg.
https://www.cnn.com/2018/10/19/us/police-sexual-assaults-mar...