1) In any area of specialized knowledge (computers, audio, vehicles), you're gonna run into people who want to push their own interests/preferences and want to either come across like they have some arcane knowledge or want to convert you to their point of view. You're also gonna run into people who don't really know sh!t but they will run their mouths anyway. Some of them actually think they are being helpful, even if they are giving out wrong info! Neither of these people are worth your time or money. As soon as you can assess this, find another employee or dealership.
2) Most motorcycle techies I've met have poor interpersonal skills. They might be friendly if you want to talk about what something very technical, but they are terrible at service desks. Sure, a lot of these guys would be great to share a beer with and shoot the sh!t with, but they are lousy at dealing with people. But they aren’t where they are because of their people skills. (Not that they are in a bad place, just that some of us are in jobs where communication and leadership skills are more important than knowing how an engine works.)
There's a good dealership here in town where they guy who runs the parts counter is a surly bastard. I don't go there. There's another place where the parts and service people are friendly but sometimes clueless. It's also close to my work, so I end up going there, and usually have to guide them to what I want. Fortunately, I do my own research. I guess if I really needed to talk to someone on something very technical, I would go to the jerk, because I have developed more confidence in him. (Sounds like the relationship a lot of people have with doctors!)