There is a hidden contradiction in your post
Which makes your reasoning inconsistent and your sort of agreement untenable. Basically, you said that with advancement of technology people understand less and less how it actually works (beyond their field of professional interest, obviously), so we should get back to stone axes and flint arrowheads, i.e. something which everyone is allegedly able to understand (in reality, it is not so, and that's why Raelism or Rael is meaningless). But at the same time you say that people more and more engage in debates about the topics which they don't have a slightest clue about. Obviously, they won't agree since they are clueless and debating not for the sake of agreement in the first place. People just like to argue and quarrel. Maybe, they had better mind their own business, something they understand?
Exactly. Just even thinking about the "religious" people on the Internet and in real life. I doubt that all of them have read the entire bible (assuming it's catholic vs catholic argument) or that all of them understood it the way the writer meant. Thus, more contradiction and more things to argue about.
I still fail to find the hidden contradiction, though. I just think that you've made another point from what I said is all. Anyway, the bottom line is that people are never going to have the same level of understanding about something. The author might mean X but some people will understand XY, then some people will mean YY. The only people that will truly understand the meaning of the author are the people that have the same level of understanding with the level of understanding the author anticipated his readers would have.