I guess it comes down to seeing some of the people here over and over again...sort of like neighbors and being more considerate with them when they ask questions, give info or need help. For example, with only a couple of exceptions, I recognize each poster to this thread as long-term contributors that I would help as best I could.
It's sort of the same with someone I meet at a given random place that asks for help; I may not go out of my way, but if it's something I know how to do and I can do it without risking being placed in a tough position, I'll do it.
I also agree that the "take it to the delaer" response is a result of fewer folks turning wrenches on it themselves, the complexity of the vehicle, low production numbers and of course the notion that many of us on this board probably have more money than time to chase down a problem. I'm somewhere in the middle and have had few occasions to need a dealer anyway.
I also participate on
www.jeepforum.com with a Grand Cherokee where the community is 180* different than ours and you can easily see why.
To me, first impressions are less impactful on a board like this unless they are a troll or a hater of some sort.