I will give that point. Good point.
But the bottom line is that there is really no such thing as "running up the score" in pro football.
I do not agree - but your statement is not "incorrect" - there is value in class - if you are up by two or three scores late in the game, you gain nothing by running up more score - although this is a fine detail and very rarely an issue.
In all aspects of life - class is always valuable
No lead is safe. Remember Buffalo-Houston 1993?