Can it be intellectual dishonesty or laziness or stubborn insistence?
Ummmmmmm.......*raises hand*, yes, guilty, all of the above. I think I stayed for the same reasons I stayed in a bad marriage. Unwilling to accept that I made a bad decision, unwilling to admit I had been gullible, kept hoping it would all be OK in the end. kept thinking it was all my fault, I wasn't good enough.
The idea that God will somehow fix all the bad is hard to give up. The reality is that the world is messy, it's chaos, there are bad people, there are wars, there are no easy solutions. To give up the dream of a perfect world is hard. When Armageddon didn't come in 1975, I accepted the stupid excuse that the Watchtower gave, that it was somehow my own fault. It didn't cause any crisis, at least not then. But the hope of the promised new system grew dimmer and dimmer, year by year. I still believed, but it started to seem less and less real. It became harder and harder to go to meetings. I stopped going out in service. Finally, it became very easy to just walk away.
I ended my marriage and moved to a different state. I wish I had done it sooner, but that is my only regret.