It is also about breaking culture and common understanding
“It turns out we don’t use code review to prevent errors. We use it to help other developers understand and accept our proposed changes to the source code. It is a practice that helps ensure that someone has checked each change being made: do the tests make sense, does the change itself make sense, have all the normal checks been run? Occasionally we catch errors but it’s not enough to consider code review a practice for preventing errors.”