The thing about an Olympic Gold is that it matters to anyone but US basketball players because of the dominance that US had enjoyed through the years. Winning a gold is akin to a 73 win team winning a le, it is what you SHOULD do. You don't gain any extra brownie points for doing something you should do, but you certainly get points taken off for not winning it.
I agree the bronze is a stain on Duncan's legacy, because they were supposed to win at the outset of the program. But then when you actually look at the construction of the team and the total lack of practice time, and you know why they didn't win.
FIBA focuses much more on perimeter play and passing, and the typical 90s/00s type of ball the NBA plays is exactly opposite to that type of play. Think of the greatest FIBA players of all time, they all have superior perimeter/passing skills. Oscar Schmidt, Drazen, Sarunas, Manu, Sergei, Kukoc. Even their bigs, like Divac, Sabonis, Cosic have extremely advanced perimeter and passing skills. Divacs was basically the best passing big the NBA ever saw along with Walton, Sabonis was nailing threes and throwing these insane passes in traffic even after he was injured and lost both of his knees.
To expect Duncan carry such a flawed team with limited perimeter shooting, and horrible passing to a gold is just ignorance. It's a different game that is played, and these casual observers still couldn't get it 12 years down the line. Sure, Team USA should have been able to tell these issues since they are basketball experts and should have foreseen these things, but hindsight is 20/20 and they didn't have the benefit of hindsight back then. It also shows the level of arrogance of Team USA in general, which led to the lack of effort and care put in to construct the team.
The 2000 team was already experiencing some close calls, and instead of looking into team construction and making something out of it, Team USA decided to ignore the problem and let it turn into a disaster.
To put the blame of the bronze on Duncan says more about the lack of your basketball knowledge than it does about Duncan's legacy.