What I am about to state here has been said many times before in various ways, but I am offering some observations that I made as a Bookstudy conductor over a period of 12 years, 9 of those as an elder, and before that as an MS filling in.
I was the type of conductor who would attempt to 'probe beneath the surface' as it were, when I conducted. I was often amazed and sometimes a bit frustrated (though I tried never to be impatient with the people there) by the lack of comments at the bookstudy that would offer anything more than just a re-read of what the paragraph said.
I realize that many folks have busy lives and of course have little time for extra thought or research. I also realize that people get tired at the end of a day, and often, they just want to get the meeting over with.
But, the demands on jws actually, as we all know, keep them from really making a deep study of what they are learning. They simply have no time for anything more than just a cursory look at the material. Also, many of them just don't want to go any further than just reciting what is in the paragraph.
As a result, these folks can be told just about anything, and they'd believe it. I know that's been said here many times, and again, I am just offering my own observation which substantiates that.
One time, a brother had to be assigned out of my bookstudy to another one. He approached me several weeks after that and said "I feel like I just went from college to high school". The reason he felt that way was that the elder conducting that bookstudy was also one of those who gave little thought to anything more than just covering material. I'm not relating that story to make myself look good, but rather just to show that elders also often times just take what is being presented for granted. Of course, on the other hand, they dare not question it.
The result of all this is obvious: a group of people that by and large are very gullible from a learning standpoint. And thus, a group of people that can be duped very easily.