People underestimate attributes like toughness, leading by example, giving more when more of you is needed, the power-vacuum this creates when you lose leadership like that. There's a lot more than just putting numbers on the board. Lots of losers like Cousins, Rudy Gay, etc can fill up the stat sheet, but it takes a lot of other attributes to build a winning foundation.
Having players you think one day can be all that vs knowing you had that player is a huge difference. I don't care how broken down Tim was, you don't lose HoF talent like that, in all senses of the word, and come out unscathed.
It's true that the league is 90% , and that perhaps the 50-win streak will likely be alive, but it's also true that there's damn good teams out there still.
Make no mistake about it, this is a huge loss for the current Spurs, IMO.