There isn't an option to change the name. Maybe you were asking why that is instead? It was just never put in as an option by the developers and I've not seen any plans mentioned of doing so.
Also, perhaps you didn't notice but the last active post in this thread was back in 2015. Opening up old threads like this is called "necroing" them and is generally not allowed. If you have an issue related to technical support, please just make a new post describing the problem. Questions about why the game doesn't have a feature you'd like should be made in the General Discussion forum instead of here as that's where the developers would be likely to see it.