They didn't win the 3 other super bowls because of cheating. Infact, Bellichick was using a practice that many other coaches and franchises employed themselves, he just got caught because of bad blood.
But anyway, since 2007.
2008-TB injured in season opener. season is a write-off.
2009-The start of the Pats completely rebuilding their defense and a lot of their offense. Regardless, still made it to the wild card game which they lost without their star slot receiver Wes Welker.
2010-They lost to the Jets in the second round. Yeah, every team loses a playoff game once in a while, even though the Pats should have won this. The jets were the better team this day. No matter how much "cheating" we could have done, we might not have won this.
What about all the other years we lost, prior to have been caught for cheating?