As with any unified grouping of human beings, an athletic team is like a living organism. A professional football team, for example, consists of a roster of players as well as their coaches, all of whom interact across roles, hierarchies, pedigrees, and levels of experience.
For the Pittsburgh Steelers, it’s an inherent function of operations. It’s something that they build and foster as a natural extension of their vision of how a locker room ought to function, and that manifests especially in the peer-to-peer coaching that has been such a part of their legacy.