Does it matter? If they were wrong on something this big and important even once, that should be enough to disqualify that religion from serious consideration by any rational person.
Do you actually understand what they got wrong? It wasn't the prophesy....it was the timing. Even Jesus' own apostles got the timing wrong. (Acts of the Apostles 1:6)
The rulership of the Kingdom was to come through the return of Christ. It meant the end of man's inhumanity to man and the restoration of God's rightful sovereignty over his own creation. It was greatly anticipated and so, because there was no timeframe provided, the disciples were eager for it to take place. Because it was still thousands of years into the future, God never revealed exactly when it would come. No one expected that it would take so long because the prophesy kept the anticipation as something imminent. That in itself kept hope alive....it still does. The fact is, no one ever has to wait longer than their own lifetime for it to happen. At death, all consciousness ceases.
Once God fixes up the mess that humans created by leaving him, those sleeping in death will be brought back life....into a "new earth", ruled by Jesus Christ. (2 Peter 3:13)
Do you want to contend that JW leadership never made incorrect predictions regarding the return of Jesus?
There were no incorrect predictions. The only thing incorrect was the timing....who could possibly have known that the human race would descend into its current level of wickedness? The last time we hoped for a specific year, was just after the Vietnam war ended. Look how much has happened since then? Who could have predicted that terrorism would change the world and our definition of wickedness, and alter the way we view our neighbors? How much political corruption has been revealed in that time? How has social media changed attitudes and the way people behave in general?
The prophesy just keeps being fulfilled in ways we could never have imagined!
Here, two years after the fact, they are still contending that they were right.
Watch Tower Society unfulfilled predictions - Wikipedia
"The Harvest is Not Ended",
The Watch Tower, September 1, 1916.
.. We see no reason for doubting, therefore, that the Times of the Gentiles ended in October 1914; and that a few more years will witness their utter collapse and the full establishment of God's Kingdom in the hands of Messiah.
Yes, we have never wavered on the year that these "last days" began. The "Gentile Times" were mentioned by Jesus as still continuing in his day. They begin with Babylon's domination of Israel and continue through the conquests of Medo-Persia, Greece, Rome, Britain and finally the alliance of Britain and the USA.....the rulership of the current world powers. There are no other world powers, according to the prophesy in Daniel.
It is still not a matter of when the last days
began...but when the are to
end....Jesus said his coming to judge the earth would be "like a thief in the night" taking most people by surprise. (Matthew 24:42-44)
So, it's still a "wait and see" for us. We seriously can't imagine things getting much worse, but according to the prophesy, they inevitably will.
All things come to those who wait......