It's strategic. It's because we're trying to correct behavior, not just punish offenders. We live in a society together and you can't just push these people out

It's strategic. It's because we're trying to correct behavior, not just punish offenders. We live in a society together and you can't just push these people out and marginalize them and expect benefits. This has been discussed to death, and the consensus is that you address behavior and not identity because attacking identity accomplishes nothing positive. Which do you think helps remove the behavior in our society: "that sounded racist, is that really what you meant?" or "you're a racist. I can't believe you said that." One of them gives the person an opportunity to evaluate what they said and how they want to be perceived by others, the other immediately puts them on the defensive and marks you and your cause an enemy to their person.