which has basically been what we did for all 6 rings
No. It wasn't. I'm just going to give two examples of how you're incorrect, but there are others:
2001 Super Bowl - mix of man and zone - the plan was to chip, hit, hold and otherwise stop Marshall Faulk while playing alot of inside leverage to force the Rams outside the hashes. "When New England was in nickel or dime coverage, especially in a zone,
Patriots cornerbacks got in their faces at the line of scrimmage, then pushed them onto the second level, which gave them more rough treatment. Sometimes, it seemed like the Patriots were wearing the jerseys of Rams receivers. It was a gamble because the officials could have called it more closely, but they didn't."
Super Bowl LIII - "As McVay noted after the game, the Patriots played plenty of zone coverage throughout the game
, including quarters
looks on early downs. Quarters helped the Patriots keep the intentions and depths of their safeties disguised before the snaps, while simultaneously allowing New England to flood the box with defenders to stop the run. The Pats used what amounted to a 5-1 over front
with Patrick Chung
as a strongside linebacker to try to penetrate into the backfield against outside zone. Here's a play -- animation courtesy of NFL Next Gen Stats -- where we see both the over front and quarters coverage behind, with Dont'a Hightower
dropping into coverage and knocking away the dig route to Josh Reynolds
Take a bow, Bill Belichick and Brian Flores. This Pats win over the Rams was fueled by the greatest defensive performance in Super Bowl history.
The Patriots don't just play one defensive style and never have. Now if you said they relied upon a #1 CB to play multiple styles allowing for a highly flexible defense - you'd have been correct, but they haven't just used #1 CBs to play Cover -1 to win their Super Bowl titles.