I've got a lot of compassion for many of these people doing what is really a crappy job.
A car or truck is a technical,product and they really don't get much training or support. So there is us who geek out on trucks and tow weights and gear ratios. And there are Mustang guys who geek out on obscure suspension options available. I'm sure there are websites dedicated to obscure elements of minivans, but I don't even want to think about that.
Anyway, I just don't really expect much. Actually, I don't expect anything from a dealer. Nor do I want anything from a dealer except to quickly process the paperwork when I get there to buy the vehicular I have already picked out.
I have found the manufacturer sales tools amazing. I can sit at home in my underwear and search for the exact vehicle I want, see which ones are closest in a particular geographic area and then negotiate for it. All without leaving the comfort of my couch.
As the digital sales tools continue to get better, the car sales dudes and the lot will continue to become less and less relevant. Especially to the knowledgable buyer.
:-)