> Why is it in your interest

Because a society where we can have less partisan opinions and more fruitful discussions is a better one.

But I'm not attacking you, and I don't think most of the other commenters are, either. You expressed a disagreement with its thesis and explained how identity has been useful to you. I just pointed out that perhaps there is a way to achieve the same goals without expanding your identity. I was trying to have a discussion about the essay. But it appears I misunderstood, and you did not actually wish to engage in a discussion, so I will stop here :)