With respect witnesses produce billions of literature a year but we do count the literature as able to do it's own preaching work.
Your examples are people handing out DVD's and Bibles put in hotels that involve no actual preaching work.
My reply: Neither does the JWs leaving their pamplets and running.
The Jews had God's word the Bible and still needed to be preached to by Jehovah's son Jesus.
My reply: And He is all we need. The GB has inserted itself in His place.
The Sept 15, 2010 WT on page 23 states :
The anointed and their other sheep companions recognize that by following the lead of the modern-day Governing Body, they are in fact following their Leader, Christ.
Debator said: The ethopian eunuch was quoting from Isaiah but still needed Philip to be sent to preach to and teach him. The Bereans had the Bible but used it to test The accuracy of Pauls preaching against.
My reply: And he never saw Philip again. Not the case in witness world- where their salvation is deemed dependent on their keeping in touch with the self-proclaimed FDS
Preaching is more than just handing out DVD, Bibles and pamphlets It leads right upto the people being Baptised as Christians and then becoming preachers themselves.
My reply: As many evangelical Christian acknowledge and do. The JW busywork of door knocking will lead to a rare and occasional baptism into "God's spirit-directed org" as a member (not as a Christian) and their becoming preachers of more WT lies.