There were some forms of proselytizing I did not mind, such as conversations with people who had genuine questions when they learned I was a JW. But going door-to-door on weekend mornings --especially in the over-worked territories we lived in-- meant that we were creating a situation where we were least likely to be welcome. And no one cared, because reporting hours was an important metric.
I don't know how many years I went door-to-door. Thirty? I may have had two or three good conversations in all of that time. I had far more useful conversations at work or with friends who simply had a question or two. I don't think I converted anyone, but I was able to discuss issues and even leave literature with them sometimes. Accosting people in the street or bothering them at the worst times is only good for adding an hour to the monthly total. Not so good for actually saving people.