Maybe this is the reason that the certain other BDFL is still in service? Maybe it's part of psycho-hygiene in order to be able to continue? I sincerely don't know - your question just triggered my experience when working in psychiatry and seeing how the staff was venting, talking and joking about patients - once the doors were closed. I was very shocked, was quite young, around 20 when serving - but one of the doctors, when she saw my shock, took me apart and explained that this behaviour, so shocking it might be when seeing it for the first time, is part of psycho-hygiene that allows the people to be able to continue to work and keep a certain distance.
Sure, it's not the same, but I am questioning myself, if for these roles, like the BDFLs we are talking about, it is not necessary to have a personal way that allows to handle all the pressure, still keeping being yourself, defending your vision of your life-work.