Sounds like poor customer service or poor communication to me.
I wrench in a bike shop. Yesterday, for example, I sold a bike to a guy just getting into riding. Like all our customers he got a generic manual that covers safety/warranty, etc, run down on the 2 free services included, a proper bike setup (including suspension run down if the bike had suspension), discussion about using gears/keeping a straight chain line, maintenance/lube-service info, a demo of how to take the front wheel off and put it back on, and a warning not to squeeze hydraulic brakes with the wheel out.
From talking with a customer for 15min about what sort of riding they do, where they plan to ride, what bike they currently have, etc, I can generally gauge what sort of information they need to know and what info would overwhelm them. If that customer doesn't want to talk though, then there's not much you can do.
From a shop's perspective, if you walked in and said I want this bike and laid $4K on the counter, I'd have to assume you know your stuff and had done your research. The information I'd give would tend to be proportionate to the amount of questions you ask from first coming in, all the way through to picking the bike up. Having said that, it wouldn't hurt for the staff to ask you if there was anything you wanted to ask them.
Another example might be that a $4K bike might come with a dropper post, which I'll bleed when building the bike. I'm not going to give you an open bottle of hydraulic fluid and syringes if you haven't expressed that you do your own bleeds and would like them. A car dealership wouldn't give you a manual on bleeding the disc brakes of your new car, but if you were that way inclined, you could always look it up or buy the tools and service manual yourself.