Just getting back to the O.P, and the steady dumbing down of the teaching of how to present their faith to the public, that does explain why J.W's today are so inept. They cannot defend their beliefs, they just refer a person to the god-awful Cult-like Org. Web Site.
We had many examples, culled from textbooks , of how to do it.
I even remember one from before the ones mentioned by St.George, it was called "Equipped for Every Good Work" IIRC, and was itself dumbed down, by another new book, by the time I was old enough to join the TMS.