Legal protections for marginilized or protected classes is generally based on categorizations that can not be changed about a person. You can't just wake up one day and change your perceived race, or decide to be 20 years younger.

Geographic location is not a category for protection, nor is it going to become one. First, it simply isn't something that can't be changed, and second, our elites in general want us to be able to move around freely, so they aren't going to make it one.