I know of several young jw men who actually resented how little they saw of their elder dad's when they were growing up. And they don't want the same for their kids, strangely enough the younger generation want to take an active part in their children's lives. Then there's the huge workload, of which they will have seen their own dad's struggling with. The late night calls from distressed jw's wanting support, the report writing, letter writing, extra meetings, extra training and that's all before the issue of jc's is considered.
A recent co at an assembly actually said from the platform that the wt has lost a whole generation of ms, pioneers and elders. The young just don't want it and really who can blame them?