So your only rationale, as well as your measuring stick of a successful move, seems to be based on whether that team wins a Super Bowl? Otherwise, all moves are just filling perceived but not actual needs that a team perceives it might have. You also extend this to your own life by saying that you don't really need things either and you are comfortable with what you have. So for you, it is fine to just set the bar lower and not improve the situation, since a football team/you are comfortable as is? I never said that signing AB, Dez or Sanders was a guarantee to win a SB, nor a guarantee to improve. However, they are moves done by teams with winning records, trying to improve their chances at winning a SB. I think if you ask the GM's making such moves, they aren't just moves to make moves as you want to imply.
You seem to be set on saying the Packers (or you) don't "Need X", you are right, because there is a difference between "Need" and "could use". Nobody "needs" anything except air, water and food to survive. A football team only needs 11 players at a time on the field to play football. So yes you are correct, we can all settle for less and at the end of the day survive. Now if you are talking about success and making it to the top, your "could use" probably should be viewed with higher priority, but that just all depends where you set your own personal bar I guess. However, I don't think you should continue to measure the success of a football team or the moves it makes by using the ultimate bar, winning a Super Bowl, if you don't recognize the difference between "could" and "should".