I don’t believe in dress codes being of benefit, but this is strictly Texas being a dick.
I was in the Army (for school, the cause sucked), and African American soldiers were often CORRECTLY given a shaving profile, aka a waiver due to ingrown hair shaving issues especially in field conditions, and it wasn’t a deal. At all. In the fucking military, the (understandably) pedant, rule follower, uniformity kings.
The Texas government just doesn’t want to make reasonable accommodations because they’re racist pieces of shit who believe they can legislate those outside their rigid, white nationalist, stepford aspiring in-group out of existence.