Hi BillA, been a while, good to see you.
To answer your question:
Because they don't like the nature of the internet.
When you have a resource as big as OCF, there are going to be these types of questions that people get tired of seeing. I admit that is probably one of the reasons I don't go into any specific forums anymore and just work from the search tool.
The "best" people sometimes prefer focused more in-depth information without all of the squabble that comes with it from people who do not know as much as they do.
When they relocate to smaller communities, it is not that the people there have more information, it is that the people there are fewer and there is less low-level discussion.
This is the nature of the internet. OCF was the same way as smaller forums when it too was their size, but when you get a memberbase as large as it is now a lot more low-level posts will be found.
There are pluses and minuses in both situations which are fairly plain to understand.
I think you would perhaps be the best person at explaining what makes it better to take greenmans (and others) perspective of chastising members when they ask a question that is basic to us? Why is that better?