With their decision to allow the lapped cars to pass through, the officials guaranteed Max would win Abu Dhabi and the WDC because, as noted, Lewis was no match on his worn tires for Max on fresh tires. Maybe the officials didn't see that at the time, or maybe they just wanted Max to win the WDC because they felt yet another Lewis WDC would sap interest in the sport due to Mercedes' commanding dominance of the turbo hybrid era to that point.
But my making that decision, they robbed us of an outcome that still could have resulted in a Max WDC, for if the lapped cars had moved aside and not held Max up, it's reasonable to presume Max would have caught and passed Lewis because he was so much faster (by seconds a sector).
Only if the lapped cars held up Max, would Lewis have likely been able to bring his car home in first.