The Texans have at least 3 minority candidates scheduled for an interview. They are really checking that box. I would say you are indeed, wrong.
It's not hard to say that Frazier is qualified, since he was previously was a head coach that led his team from a 3-13 season to making the playoffs the following season. He was a successful college head coach, a successful position coach and coordinator, as assistant head coach... most white coaches don't need that type of resume to get multiple gigs. Look at Gase for example.
You say you don't know if he's qualified, but feel confident to post that you think he's only being interviewed to meet a quota. That's really weak.