No, it's not about blame. Also, the hypoxia problem affects only a small part of F-22 flights. However, it is good practice in aviation to dig into any problem, whatever the cost. This has been the foundation of flight safety. We could never have had such a booming aviation business if we would have been sloppy on safety.
With 5th generation aircraft one is breaking new ground. Better sort out the F-22 problem before the same cause propagates in hundreds of F-35's. Many feel the report on Elmendorf was too quick to blame the pilot, and was not taking the problems seriously. E.g., the fact that it wasn't possible to identify the cause of the original bleed air problem should have made the report much more prudent in its conclusions.
In this case, some bad press is saving lives in the long run.