I would agree with those who have indicated that this is not simply a tractor dealer issue. It occurs throughout the workforce.
As a total noob buying a tractor, I certainly wanted someone who was knowledgeable, but after going to a few dealerships what I wanted most was someone to act like they actually wanted to sell me a tractor! I go blown off totally by several places. I say something like, "I've got a budget of about $15-$20k" and having the guy shake his head and tell me they didn't have anything in that price range on the lot. They may have been true, but the guy made it clear that our conversation was over.
On the other side of the coin, I'm sure a noob like me is hard to deal with. I had no idea what I really needed, I only had a rough idea about what I could spend and I didn't know much about tractors. So the salesman has to deal with total ignorance. So even getting started was probably a hurdle. But you know what, several of the salesmen were up to the task. They answered questions. They gave me brochures. They returned phone calls. They didn't make a beeline for the most expensive luxury tactor on the lot and tell me i had to spend more than I wanted to.
Bottom line in my mind is that sure, knowledge is important, but just knowing what a potential customer wants and needs is just as important.
I still haven't gotten over the places that blew me off. Some of them wouldn't even offer me a brochure.