An Unbiased Fan wrote:My only problem with using numbers "with & without" a star, is that it penalizes players who had decent bakcups, and elevates those with poor backups.
The 94' Bulls are a perfect example of a team still performing at a good level without a missing star(Jordan). Pippen assumed the main role of volume scorer(though not nearly as well as MJ could), and they won 55 games, with the addition of Kukoc. Conversely, the 97' Spurs compeltely collapsed without DRob, but that's because they had Greg Anderson & Will Perdue filling in.
This gets even more sketchy when you take stretches during a season.
I think you overrate the significance of this concern.
Let's take the example above: People talk about Pippen scoring more, but he only scored 1 more PPG than his previous peak, and Kukoc literally only scored about 10 PPG. The team basically abandoned the entire notion of having a volume scorer, so it really doesn't make sense to say "Well they were just lucky to have another guy who could volume score." Everyone did pretty much what they did before, and they were good, so they won.
At the same time, W-L very much underrates how much worse the Bulls actually were without Jordan. In '91-92, they had a SRS of 10.07. In '93-94 it was 2.87, and in '95-96 it was 11.80. That's actually a totally massive difference. They were just so damn good firing on all cylinders, that with some good breaks they could still win 50+ without him.
I don't disagree with you that a player's irreplaceability in one particular situation does not tell the whole story, but basketball is not a sport where you have a QB-like position and you literally see an superstar level guy rotting away on the bench. About the most extreme situation you'll see in the NBA is a Howard/Gortat situation - significant enough to factor in, but not the difference between a 50 win team without Howard & a 20 win team without Howard.