I don't follow the circular logic, every superstar can lead a team to championship if they have help? Do you define superstar as someone who can lead their team to a championship? The term usually refers to a player that is one of the leagues' top 10 players and is among the league leaders in scoring, play making, or defense. Of those superstars, only a few of them can be the #1 option on a championship team. Some teams win championships with these guys, some teams like the Spurs do it by committee. LeBron, Dirk, Kobe, and Pierce are superstars who led their teams to championships. Of course they had help too, but they led their squads to the promised land. Durant has the talent and the temperament to get there, but hasn't done it yet.
My point is that Bosh made the assessment that he wasn't in that group, so he sacrificed to win a championship. We should be celebrating that. I bring up Dwight Howard as someone who could have made a similar career decision, but cares more about his brand then winning titles. Dwight could be a key contributor and piece on a championship squad, but he'd have to do what Bosh did and take more of a specialist role. It's partly the eye test, but if you've watched DH you know he's not a #1 guy. Opting back in to his last Orlando contract, pulling rank in LA, and moving to that Houston team were bad moves in that light.
Edit: To be clear, by best shooting big, I'm referring specifically to centers, not stretch fours like Dirk. Bosh and Marc Gasol are probably the best pure shooting centers in the league. But even without that qualification, Bosh is one of the most efficient mid range shooters period, regardless of position. You know he is a great rebounder based upon his stats in Toronto, even though the numbers have taken a hit with a smaller role in Miami.