My understanding is that this was not a fit-for-flight test article that failed and only a test used for extrapolation of some proposed features. Surely the final aircraft configuration will meet all the published requirements.applicable to growth airframes validated by many hours of safe-flight experience.
Before condemning the FAA. and Boeing perhaps the posters could cite specific exceptions to a rule that applies in this case.
Aside from the conspiracy theories, the test is a single event test, not a repetitive or cyclical test.
Slowly bringing the ac up to 1.5 loading really doesnt provide a real test of conditions.
I think there is quite a bit of value in repetitive testing to the typical loading, many issues found in the field may have been avoided. having driven through quite a bit of turbulence, I always wonder about the stresses on the airframe.