the best i can think of is that those that do it learned it from their parents. if parents don't take us seriously and treat everything we say or do with skepticism, and yell at us for things we didn't believe we did then we grow up with the attitude that anything someone says is to criticize and our first reaction is to defend ourselves. meaning it doesn't come to our mind at first that the person talking to us could be saying something we would agree with.
it takes some time and patience to develop the trust that not everyone is against us, especially not the partner we love.
A sibling reply said something about assuming the content of someone else's statement, and thereby missing what they're actually saying. I know I do that, too. That's a hard one for me to break, because often - in an area that I know something about, at least - I can anticipate the question, so 90% (or something) of the time there's no immediate negative feedback. Wait... No negative informational feedback: there's probably a negative interpersonal reaction, to which I'm not properly attuned. Right.
That's worth thinking about. Thank you! I really appreciate your response.
But as for "agreeing loudly" , I love the term never heard that before. Its definitely something I notice myself and my friends do and stop the discussion when I can. My guess is that it usually starts with some sort of misunderstanding and kinda spirals from there, but also interested to hear thoughts!
Well, it simply appears to me that the responder above believed they were contradicting the grandparent comment. So they responded in the tone of a rebuttal, without realizing that two different ideas were actually the same idea. Most likely they misinterpreted the top-level comment because it was glib and not elaborated. Perhaps the cynical tone of the top-level comment also primed them for disagreement.
The reality of what they say differs from how you imagined it. Maybe it was close, but they participated new information, so now you feel the urge to contribute as well. Add your own perspective.
You are now suddenly in an arms race with the other person to find the "correct perspective".
EDIT: I also think that the premise of ideas are easy and realization is hard implies that it would be contemporaries having the ideas and doing the realization. Otherwise all we're really saying is that ideas precede realization.
It's like it's a common personality quirk amongst users of this site. I think I avoid it in writing (though check my comment history? I may not be blameless!), but it's something my wife (with justified irritation) pulls me up on in person, because I do it all the time to her. She'll say "babe, we're agreeing loudly", and I'll have to apologize for doing the it again.
Does anyone have any insight into why the hell we do this?