I think that deep down, most Jehovah's Witnesses know that the end is not coming, at least anytime soon. They go out door to door, not to warn people of impending judgement, but in a perfuntory way, because they need to write down some hours on a time slip, to keep from being criticised by the elders, and as insurance, just in case Armageddon does come.
The Watchtower is the boy who cried wolf one too many times, they may keep the most devoted believing the end is coming soon, but everyone else has figured it out, even though they cannot admit it to others, or even to themselves.
If they really believed what they claim they wouldn't waste hours of field service knocking on the doors of empty houses and driving all over town to make one return visit. There is no urgency to their work, no effectiveness, no real results. 1914 is a meaningless date, based on questionable logic and an incorrect date for the fall of Jerusalem. Armageddon didn't happen then, as the bible students thought it it would at the time, or 1975 as they said, and it won't happen next year or any other year.