I think that this question illustrates that beliefs are more important than facts. My JW elder experience taught me that elders accepted their "appointment" for different reasons. Some were going to be loyal to the SS Russell/Rutherford/Knorr no matter what bearing. Others wanted to help people. Some thought they were worshiping Jehovah Jesus. Others just wanted to reach their goal....
To me, what tests most elders are the pedophilia cases. You have to be totally bought in to support the GB bullshit on that. And yet, some sincerely believed that is what YHWH wanted. Sooo, their bullshit tolerance was clearly higher.
I think the average elder is below average, but, having said that, it just depends if you are looking for the nonsense. If you aren't, you won't see it. If you are willing to be honest to even a small extent, you can see it. I have no idea to tell who sees what or how they interpret it.
My gut tells me that if you're a youngish elder, there is a fair amount of ego involved. If you're older, there is a fair amount of time involved. For both, a certain amount of nonsense would likely be tolerated...