"If people can change to become witnesses it must also be possible to change outside of the organisation."
They can certainly change for the worse that is for sure. The change that a person undergoes in becoming a Witness is so dramatic because there are powerful forces at work molding him: systematic study of the Bible, introduction to a stricter set of moral codes than normal society is used to, being in an enviornment where others follow these stricter moral codes, ect. So once you leave that, where is there to go but down? If you developed the habit of lying and being dishonest in such a strict moral enviornment, then how on earth do you expect to just magically become truthful again in a more morally loose enviornment? If anything a man would trend towards being even more of a liar.
"If you have not pioneered whilst trying to support a family in the middle of winter then perhaps you are in no position to judge."
Boo friggity hoo. Did you have to walk uphill through the snow both ways too?
Pioneering is voluntary. If you really hated it so much then you should have just become a normal publisher.