First of all, JW's just believe that Joe Hoover is gonna waive his magic wand and "POOF" everything is going to be Paradise. Turn rocks into bread and water into wine.
I really sometimes wonder if the GB isn't intentionally trying to wake people up without coming right out and saying "we were wrong". ~ mynameislame
I suspect the GB would have no problem if all the "fringe" JW's took off. You know, the JW's that just take up space. They don't contribute anything. No productive recruiting. No donations. And what they do do (dodo?), is perhaps ask embarrassing questions that raise doubts and cause general discouragement and apathy.