Contradictory viewpoints can't all be right; if there are three different root cause analyses, at least two are wrong, and if there are actually three interacting causes where each identified a single independent root cause, they are all wrong, not all right .
Now, they are all possibly approaching the truth from different directions, and need a synthesis of each others views to get to the truth, but that's not the same as the discussion-ending idea that inconsistent explanations can all be right so attempts to resolve the conflict are unnecessary.
I was thinking of situations where the "causes" can be additive. "Why are we consistently late?" CAN be caused by broken technical processes AND understaffing AND bad product design. Did not intend "root" to be taken that literally.
Now, they are all possibly approaching the truth from different directions, and need a synthesis of each others views to get to the truth, but that's not the same as the discussion-ending idea that inconsistent explanations can all be right so attempts to resolve the conflict are unnecessary.