I don’t generally have much positive things to say about American football, but the way it is structured does allow for a lot of familiarity and congenial attitudes between players of the same positions since they are rarely ever actually playing against one other on the field.
Maybe that says more about the sportsmanship of other sports though, where people do face off against one another on the field and can still be respectful and even friendly off the court/field/pitch.
Either way it’s an interesting differentiation.