Genetic testing would mean flirting with that dreadful "reality" thing, which some States are making illegal.
If I'm a 45 year old bearded male, but I self-identify as a 14 year old Chinese girl, which will the genetic testing report to my employer? Who are they to tell ME that I'm not a woman?, or Chinese?, or Black?, or a giraffe? That's racist, sexist, and homophobic! I see many lawsuits in this.
Genetic reality is infringing on my right to be a delusional weirdo. I'm suing!