Phizzy, yes. Even JW's warn about being "stumbled" which is surely when another JW or the GB do something to "hurt" you emotionally. I'd say it is an important factor although others such as learned behaviours, routine, social dependency all conspire to keep people in.
I disagreed with most of the pivotal teachings, lifestyle and impact on my prospects yet it took me years to leave. This was because of fear of not being socially and financially independent. I'd agree to a certain extent that an emotional kick led me to decide to go but frankly there had been dozens, maybe hundreds of those - I felt as a JW that rejection and emotional upset was a daily way of life.
The silent lambs BBC program played a powerful part - that made me so angry. I guess that is doctrine but maybe all those emotional embarassments, humiliations, anger at stupid magazine articles or talks or answers played their part.
mmxiv