What this observation does do is that it puts the lie to all the babies who insist that the insurgency happened, or has been as prolonged as it was, because Bush or Rummy "miscalculated" or "didn't put enough boots on the ground".
No amount of "calculation" or "boots on the ground" would have reversed Turkey's decision or its ramifications.
The ramifications were bad, and that happens in wars: events happen with bad ramifications. But overall, the war has been one of the most successful comparably-sized wars in human history.