How is that different from any other accident of birth that can't be changed? People really do discriminate based on when you were born:
Not hard to extrapolate a case from this. Imagine a landlord refusing to rent because you're a "scorpio" or an employer turning you down because they're looking for a "dog" person.
I love these kinds of very specific slice of life stories from work. It's so weird how these things can feel like such a big part of your life, but most of us just forget about them as soon as we walk out the door, let alone change jobs. Work is so weird lol