You guys realize that Manu, Tony, and Tim were all healthy and in their primes for two seasons, don't you?
2006, 2007. That's it. Manu was injured in 2008 against LA, then in 2009 Tim's knees gave out. In 2005 Tony still couldn't shoot for , and good defenses gave him trouble (see Finals).
Tim Duncan has had to play with the likes of washed up Terry Porter, Danny Ferry, washed up Avery Johnson, and a banged up David Robinson, who missed chunks of the 2002 and 2003 playoffs. Timmy has had help, but not as much as his detractors/KG and Dream fans would have you believe.