I served as an elder for nearly 20 years and I can tell you from personal experience that nepotism was one of the the greatest failings amongst elders. I served with many good and sincere elders and well as some rotten eggs along the way, but even the good ones often gave into nepotism, either by promoting their children to readily for privileges, or by protecting their children from discipline or judicial actions.
@JTrottigy - if you believe nepotism doesn't exist in the org you either have no experience in the matter, or you are delusional. I have witnessed personally dozens of cases of it in my time. Yes, on paper it is something that Witnesses don't approve of and good men actively try to avoid, but the reality is far different from the intentions.