It's not only the JWs who do door to door witnessing. The Independent Baptists for the most part have "soul winning", mainly door to door witnessing and leaving tracts, as a tennet of their faith. This discussion is interesting:
https://onlinebaptist.com/forums/topic/21149-door-to-door-soulwinning/?do=findComment&comment=374657
When you were doing the door to door work, could you sympathise with the anxiety a lot of these posters seem to feel? If you had been able to discuss the issue freely with fellow JWs, without fear of being disfellowshipped or at least cautioned, do you think that those discussions would have looked very similar to these?