You could say to your wife something like....
" I've heard some Witnesses say "It's a perfect orginaziation run by imperfect men" so one could understand how someone like Brother X could be wrongly appointed. The trouble is, thousands are shunning their family members and former friends who may have been wrongly disfellowshipped by men like Brother X , who were wrongly appointed to a position of authority. It's scary when you realize that 8 million people worldwide have planned their entire lives around the directives made by imperfect men who they've never met and are ready to die if they need a blood transfusion for example. Especially after all these decades, these men have decided to allow blood fractions....hopefully, for the parents who's children have died, they won't decide that the rest of their understanding on the blood issue is wrong as well. Anyway, I guess only time will tell."