No, it sounds like I'm saying that the casting process, like all employment processes, should be racially neutral and give equal opportunity to everyone.
As I understand it Christopher, you legally can discriminate when hiring actors, and when hiring models. In terms of age, gender, appearance, disabilities, changing weight, etc.
We could always start a petition to see spider people represented on the bridge of a starship. Petitions always work.
I like your idea, and will sign your petition.