Mikkelsen brought 17 manu points over those two last rallies to Hyundai. More specifically in Japan he made the title fight last to the power stage where both him and Neuville failed vs Ogier. (Toyota would win title even if PS ended Ogier-Neuville-Mikkelsen-Evans)

Tanak brought 22 manu points over the same two rallies. Much more importantly he crashed out when told to drive safely for 5th-ish place on Sunday (Abitebouls words) losing Hyundai a secured title. Being last on the road on a stage that was getting very dirty with at least 3 early running cars pushing he had no chance to ever get driver title.

Even in the case of Neuville crashing 2 Toyotas were pushing on Sunday (Katsuta focusing on PS) as it was the only way to secure title + Mikkelsen was pushing cause he was first on road and had no points to guard. So Tanak would never get full Sunday+PS points.

Unforgettable mistake is indeed the right word. Do wonder why is there a need to point at someone else?

Two rallies before Lappi brought 0 manu points in Chile, should we start blaming him as well, or Tanak for the rally ending crash in Finland, or Neuville for CER off?

Nope, no other situation compares to throwing away a secured title by Tanak on Sunday in Japan.