Westiebilly11 l am really not sure about your assertion that the WT haven't deceived anyone. What about 1975 wasn't that deception ?
They could not have KNOWN this because it didn't happen. You must know that faithful JWs sold houses and cars to donate the money to preaching work . Then when it didn't happen none of the money was paid back .
You ask why would they do that , which was my question. So perhaps l have answered, in part at least , mine and your question.
It's not just JWs who have done this of course. So maybe that is one motivation, getting money from followers.
Jan from Tam