They see it as discretion, like when a salesman demonstrates something. He does not show off his product's weak parts. I was discrete too,but I think I would have given straight answers to the original poster's direct questions.
Mind you, as I write this I remember a spirited debate with a young man who had read that J W's predicted the end definitely in 1975.. I told him that I was there in'75 and knew exactly what they had or had not said...At that time I knew they had not actually said in one sentence "It will end in '75" so I felt justified. I think it is a loyalty thing. When one is out on the doors, you stand up for what you believe in.
The WT has printed this about the use of "strategy"
Wt 1960 p352
"God’s Word commands: “Speak truth each of you with his neighbor.” (Eph. 4:25) This command, however, does not mean that we should tell everyone who asks us all he wants to know. We must tell the truth to one who is entitled to know, but if one is not so entitled we may be evasive. But we may not tell a falsehood.....................
(Example of Rahab)
This would come under the term “war strategy,” as explained in The Watchtower, February 1, 1956, and is in keeping with Jesus’ counsel that when among wolves we must be as “cautious as serpents.” Should circumstances require a Christian to take the witness stand and swear to tell the truth, then, if he speaks at all, he must utter the truth. When faced with the alternative of speaking and betraying his brothers or not speaking and being held in contempt of court, the mature Christian will put the welfare of his brothers ahead of his own, remembering Jesus’ words: “No one has greater love than this, that someone should surrender his [life] in behalf of his friends.”—Matt. 10:16; John 15:13.
WT 1956 Feb 1 p86
"37 In view of the above-given Scriptural examples Jesus was in harmony with the spirit of Jehovah God in instructing his apostles when he sent them out as sheep among wolves: “Prove yourselves cautious as serpents and yet innocent as doves.” Since the unchristian wolves declare war upon the sheep and choose to make themselves “fighters actually against God,” it is proper for the inoffensive “sheep” to use war strategy toward the wolves in the interests of God’s work. No one against whom this strategy is used is unrighteously hurt because of it, whereas the “sheep” or those interests that deserve to be protected are safeguarded. God does not oblige us to show the stupidity of sheep and play into the hands of our fighting enemy. We should meet the seed of the Serpent, the “offspring of vipers,” with the cautiousness of serpents. Foreseeing danger, we should cover ourselves against the wolves that prey upon Jehovah’s flock. “Oppressive wolves will enter in among you and will not treat the flock with tenderness, . . . Therefore keep awake,” says Paul. (Acts 20:28-31, NW) “A prudent man seeth the evil, and hideth himself.”"