I disagree.
If Scola and Butler don't pan out, then the Spurs will have been correct in their future projection of their worth. However, they still deserve criticism for not getting even close to value based on present assessment.
Scola and Butler were assets which they turned into nothing when they should have gotten something (like a first-round pick). Not only that, they gave them away at zero risk to a divison rival. There's no way the Rockets can lose on that trade, unless Scola turns out to be an awful locker room cancer.
If Portland today traded Oden for a 2010 second round pick, and Oden immediately goes on to be the greatest bust since LaRue Martin, does that still mean that Portland made a good trade?