The tendency to describe unloviing actions by elders as imperfection is totally cult mind control. The organization introduced the phrase and concept of God working through imperfect men so that when they get the predictions wrong the cult survives.
The JWs who continue to believe in 'imperfections' after decades of abuse by untrained clergy are just terrified of the domino effect of the thought that if people are acting in an unjust, unchristian way perhaps it means they are not appointed by Holy Spirit after all. If that's true then perhaps this isn't the true religion and if that's the case my whole life has been a waste of time, I'm going to die, no paradise is coming, I don't even have a pension ......
Only when the pain of being in the organization controlled by leaders that don't care whether you live or die becomes more unbearable than the pain of no panda paradise can facts begin to be absorbed. It's human to opt for the least amount of pain.