To CowboysFan:
https://www.jt-sw.com/football/pro/teams.nsf
This link will take you to the history of all the teams in the NFL. It gives you head coach names, schedules and results, also players and some stats. A good research spot for going back and verifying what you remember from days gone by.
Now I suggest you click on the Cowboys and look at the teams Dallas has faced in their winning Super Bowl seasons.
In 1971 they played the Cardinals who went 4-9-1. They also played Jets who went 6-8. They also played the Saints who went 4-8-2 - - and lost that game.
In each year this team has made the NFCCG, they have played teams who lose more than they win, teams on par with the Cowboys, and teams (At the moment they played) who had a better record. This includes the 1977, 1992, 1993, and 1995 seasons. And in some cases lose to a team far inferior to the Dallas team that year. Even the years when they went to the Super Bowl and lost, they still played the dregs.
Now I am not building up to suggest this is a Super Bowl team. But every year every team plays games against poor teams and good teams and sometimes great teams. Except for the 1972 Miami Dolphins who played the 3rd easiest schedule in the NFL and went undefeated.
I also suggest click on the 1972 Dolphins, then click in the season record, and then click on each team they played and look at all the L's in their season games. Everyone brags on the Dolphins but they played a who's who of losers that year.
The point is quality wins look different from game to game. Both the Jets and Chargers have pretty solid defensive lines, yet Dallas figured out how to beat both. The Cardinal game arrived during a spell of players out and the team wasn't prepared. To make this make sense, look at the last three games of the 9ers. Or the Chief's who lost to the woeful Broncos yesterday.
You play them one at a time.
@blueblood70 is absolutely correct.
Some fans, like you, think if they don't waylay every opponent week after week, playing the best each game, then all hope is lost. You do you, and think as you wish. But invariably the moment people crown a winner in October, some other team which was unexpected comes up and strings together a play-off run to win it all.