Some things don't go together.
Nearly 100% of people who go to prison in the United States have eaten pizza.
That doesn't mean eating pizza makes one more likely to go to prison. It just shows how common pizza is.
JW's are cart/table witnessing now and the number of active JW's is severely down.
I mean, I didn't leave because of the style of recruiting. There are plenty of reasons to become inactive.
I could just as easily say that there has been a decline since the silly overlap generation doctrine or since the 100 year anniversary of Jesus casting Satan out of heaven or YADDA YADDA.
I actually think cart witnessing is much easier than getting doors slammed in your face, and while much rural and foreign language recruiting is pretty easy, just driving from address to address can cost plenty in gas. Better to sit or stand at one spot.