The reason they won those games was because of their defense and Brady doing just enough to win. Bucs D is top 10 in scoring, total D and passing D. Bowles is a good D coach.
Tell me how BB would've fixed the OL decimated by injuries, retirements and departures. How BB fixes the running game which is dead last in the league. Would he fix the lack of creativity by the OC by hiring his buddy Patricia?
Both BB and Bowles are defensive minded coaches. They both have top 10 Ds. They both have anemic offenses. They both have suspect OLs. They both have the same record. The only difference is BB has an avg running game (#22) and passing game (#22) and Bucs have a good passing game (#4) and terrible running game (#32).
Would the Bucs have a better record with BB as their HC? Probably, but to say he gets them 11 to 12 wins given all of the above is not realistic. Would the Pats have 11 or 12 wins if Brady is their QB? That's not any more likely. Brady would've torn up the Vikings, Raiders, and Dolphins secondaries, so that's 3 more wins, placing the Pats at #5 seed.