I heard a brother say "disfellowshiping only test your heart condition. If you love jehovah it will only make you stronger. look at me I was disfellowshiped, and now I am and elder! *jolly chuckle*"
The problem the watchtower has is some of its edicts are so irrational they are untennable. So many people separate the watchtower, from Jehovah. For example they may fornicate (the wts definition) because Jehovah doesn't mind, but they'll never take blood. Now that they want to get married, have kids or their boyfriend or girlfrind left them after they had sex a few months, back to the halls they go to get reinstated because we have Jehovah you see.
I think the "truth believers" or credible JWs are the ones that do get effected, but those are not the people the watchtower wants. They don't want people that will stand for their own priciples or die. Those people are "stiff necked", or unwilling to take counsel. They want maliable, or liquid people that conform to the shape of any mold they are pressed into in.