The Apostles were not factual when they thought and believed/taught the end would come in their lifetime. They made a mistake.
Did they prophecy in the name of God? By your own admission, no. Has the Wt? Absolutely.
Jonah was not factual when he said Nineveh would be destroyed - since it Nineveh was not destroyed. Jonah did not say "repent or be destroyed", he said the City WOULD be destroyed.
That is always inherent in God's warnings. In fact, Joanh himself admitted that is why he ran. He did not want Ninenah to repent. He wanted them to be destroyed. Why? Ninevah is the capital of Assyria...the same people who dispossessed Israel of their land. No love lost between the Jews and the Assyrians.
Nor did he say "God said" the City would be destroyed - he said it would be. Though he did not make a mistake in this statement, as God changed his mind - but Jonah was not pleased with how it all went at first. You know what it says - believe what you want. I was simply making a reference to how not EVERYTHING said by a channel of God happens exactly how it is pronounced.
Again, God's warnings always come with a way out. This was no different.
What if God decided not to bring the END in 1975 after considering all the people who would join the WT thereafter??? I am not being serious in that argument (so don't bother refuting me), but I will say that we don't know everything there is to know. "The person who knows he knows nothing, knows more than one who knows everything"