There are so many fallacies at play, it all comes down to propaganda. The WTBTS paints reality for its adherents: Confusing (or intentionally misrepresenting) causation and correlation, insufficient sampling of statistics, counting hits while forgetting (and forbidding communication with) misses, and just a dash of truth to tie it all together - voilĂ !
Those who leave the Organization and go on to lead successful, happy lives outside will never be featured on a District Convention or in a magazine.
On the other hand, there are some who get DF'd - still blindly believing it's the truth - get into trouble on the outside and then run back to Mama Org. For members who remain inside, these examples just confirm the "reality" painted by the Society. These are the experiences you'll hear at the DC.