Like CC, I really agree with your post, Magnum, and can relate to it very well as I have been there & done that myself countless times!
The problem is, very little of what we do is actually wholehearted or heartfelt. We give a talk or deliver a meeting part not because we want to, but because we HAVE to. All the topics are assigned to us with our having to refer to WT publications as the basis for our parts, and since we are NOT able to choose the topic nor have the choice of selecting the reference material and have to stick to a fixed outline on top of that AND did not even volunteer to do it in the first place, the end result was usually a boring & dry talk with a lack of quality, heartfeltness, & sincerity. Many who deliver talks & meeting parts just do it for the sake of doing it just because they have to & they simply can't wait to get it over with. Assignments are usually viewed as burdens & those who are chosen to deliver them (or have the "privilege" of delivering the part, as some would say) often fail to motivate the weary audience as they are weary themselves!