Mike,
I once used the term "Groupthink" to describe what you surmise, and got a big slapdown. More relevant, I got enough examples of non conforming opinions to make me think I was wrong about the overall perception of the members of this site.
GCA and everything else is a star system. So, many here talk about star courses, star architects, starring trends, etc. It is to be expected, even if Ran nobly says its to discuss all architecture.
I will say this- courses get discussed more than architectural ideas. Whether people just can't grasp "deep thoughts" on the whys and wherefores, or just that a mental picture is worth a thousand words, I just don't know. But, my "theory" threads die, as do most, although Patrick gets some traction on his.