A couple of things to keep in mind. Katy is a public school participating with kids from their area. Don Bosco, the private school talent might come from anywhere. Its not talent that comes from a five mile radius of the school.
Put it this way, if Don Bosco were competing with kids within five mile of its campus, they would not be in the discussion to be on the field with Katy. The Talent in Texas excel from kids living within the district of the school.
And I do understand that New Jersey is a hotbed for high school football. However, not many states can match Texas in that area. Unless they are building mega super teams as Bishop Gorman, Don Bosco, IMG, Mater Dei and St. Francis. And even with the talent spread in Texas, the top schools manage to fair well. There are more than 1400 high schools in Texas that compete in high school football. Allen, Carthage, Denton, DeSoto, Duncanville, Ennis, Highland Park, Lake Travis, Longview, Lufkin, North Shore, Shadow Creek, Southlake Carroll, Westfield, and Westlake are all public schools competing with kids from its area.