I agree with most of the thoughts here, however, I think everyone fails to realize that 99% of the JW's do not THINK about what they hear or read.
The active ones who actually pick up on this are probably looking for something.
I know when I was in, everything "made sense" until I thought about it. Once you realize it is crap you will find all the inaccuracies.
The other advantage to the dubs is it is a statement that can be referenced years down the road for whatever reason they want.