That's one take. There's another..."Let no corrupt communication proceed out of your mouths....the good person out of the good treasure of his heart produces good, and the evil person out of his evil treasure produces evil, for out of the abundance of the heart his mouth speaks."
I take the second view.
In terms of Roger, he wasn't dropping F-Bombs, and what he said was mild. There was a reason they made fun of him - in a respectful way - and called him Captain America (including his lifestyle contrasted with Joe Namath).
I'm not bothered that that didn't appeal to you, or that the other end of the spectrum does, but it is undeniable that the Dallas Cowboys (for better or worse, whether an accurate perspective or not) were characterized as the guys known for wearing the white hats, and for class, almost exclusively because of Landry and Staubach (though they had a bunch of other classy players as well).
"There wasn’t a player on the Cowboys who didn’t look to him and think, ‘As long as we have Roger we have a chance to win,’” said one NFL coach. Staubach was also known for the way he conducted himself off the field. “His was the type of image you wanted in the game for young people,” Landry once said. Part of that is Staubach’s vibrant Catholic faith. Another aspect is his family life: He married a girl from his hometown and is the proud father of five.
Looking back on his outstanding career, Staubach admitted it was hard having to wait so long to get his NFL chance. "Patience isn't one of my overwhelming qualities," he said. "I was frustrated." When asked how he would like to be remembered, Staubach replied: "As a pretty darn consistent quarterback." Fans of the Dallas Cowboys and the NFL will remember Roger Staubach as much more than that, and rightly so."