They sure do... now explain this to me and please stay on subject. Don't do the WT thing of deviating the answer until it fits a totally different question... ok? Jesus never did that. Imitate your master please.
Lets say you are out preaching and you knock on the door of a catholic or some other mainstream religion. You bring up the subject about death. The householder has happened to loose a loved one recently and tells you how he or she is trying to cope by remembering that we do not know God's higher plan for us. That he or she does not know why God has chosen to take this relative that he or she loved very much but that he or she is willing to accept God's will.
Now remind me if I am wrong but I remember from the many years of being a witness that the standar answer prepared for us is to tell the householder that such is not the case. May be most witnesses are not as direct but they would basically reply that we should not think that God has taken them at will. In fact, some tracts and definitely books used in bible studies actually explain that such explanation (as provided by other faiths) paints a cruel God who seem eager to take people, including kids, at random. Now while many here would agree such picture is accurate, lets not get hanged on that.
Now lets pretend for a minute this householder has heard your standard answer but now he or she proceeds to tell you that she has another relative who was a witness. This other person fell ill and had to be hospitalized. While there, doctors told this relative that unless she got a liver transplant she/he would die. This person, being the loyal witness that he or she was, strongly denied getting the transplant because at the time it was seen as canibalism (this would have happened decades ago). The family, in distress, attempts to change her mind but she/he told her relatives that God had directed the slave and the slave has pointed out that such procedure would not be acceptable in God's eyes. This relative later died as expected. Now this householder is getting to the point. He or she tells you that just about a month after her or his relative was buried, he or she found out from the rest of her JW family that new light now out, informed them of a new understanding. Now God has clarified that transplants are a matter of personal choice. Under the understanding that apparently God allowed this mistaken view drag for so long and cost so many lives, how do you explain to the house holder that her view of God is cruel while yours is not?
This is where new light looses compatibility with a God of love. If we put aside the other actions by Jehovah that make many categorize it as a cruel murderous God, even if you believe in a God of nothing but love, you can not reconcíliate this fact with such idea. Either God is not all loving and derives pleaseure from seeing people suffer under spiritual confusion or he has nothing to do with any of this and this are doctrines of men which we should not follow.
You can not summarize the vast implications of dominating large masses of people under mistaken ideas by using five simple words like "imperfect human being make mistakes"