The world would be a different place if the Saints had played with any sort of defense for the vast majority of the Drew Brees era. Since 2006, the Saints have trotted out more below 30 defenses than a Canadian winter. Offenses drive teams forward, and certainly the Saints have had the offensive equivalent to the Batmobile in the same 13-year time span, but to consistently make and win Super Bowls, the defense has to be something more than a 2007 Honda Civic.
In 8 of Brees’ 13 years, the defense has ranked 22nd or lower in DVOA.