Life is full of instances of unfairness, of instances where there are issues because of the actions of others or even from your own actions.
If you have a set of ethics that you live by, if you are always trying to live right these issues become exposed.
Once exposed you can take action or the other people involved will be motivated to take action.
The right path exposes what has been done wrong. If you or the other person is a good person you will fix what is exposed. If it doesn’t get fixed you now have the knowledge to not interact with the other person.