The JW leadership has managed to marry ignorance with arrogance (ignorgance!)
They use the bullshit technique of making up stories to fit the ideas they hold dear and then ask the flock not to check up on the accuracy of the information. The JW org charges forth on the assumption of having LOYAL followers not truthful information.
The fact that no historian believes in the 607 BCE date* just shows how out of harmony with the times they are and why from now on they will decline in influence and number, especially in the Western world.
If they were to come clean and admit all of their failings and date botches and conscious deceptions, the bottom would fall out of JW credibility-- which is at a low ebb already. Either way the Watchtower is last century's religion.
Today's world demands accurate academic and scientific data on which can be built further technological or other developments, religious puffs of hot air are of no use to anyone apart from cults.
*I did find myself reading a JW apologist's confirmation of 607 BCE who was an academic but not a historian. The JW principle is always the same; it is deemed to be true if the organisation says so and you are disloyal if you believe otherwise.