> At first I thought "I don't want the details" sounded dismissive.
Well that is because it was delivered by someone who was actually being dismissive!
If they want to know what "we are changing" but don't want to know any detail as to why, even presented at an appropriate level, they are very likely looking for you to take all the risk of the decision and they are dismissing your need to have the necessary informed consent for it to become the we.
Now, if you're presenting that information at a level of detail that is truly irrelevant or deep, that is your problem to fix.
But otherwise be very wary of this pattern of communication where "we" might mean "you". Anyone with any sense of risk management should know not to do this.
If you have not seen it, watch Margin Call. When you get to the boardroom scene [0] you'll see this play out, but you will also see the (pretty rapacious, direct) boss understand properly that the information he is getting from a low ranking employee is nevertheless his problem to understand, even if only at a 10,000 feet level.
Beyond the drama of the way the scene ends, it's actually a very good model of how that interaction should play out for everyone — making it clear that everyone in the room shares in the "we" of it, including the decisionmaker.
I have been in rooms where it played out at least something like that, where the boss wants to make an attempt to share the burden of the detail, and I've been able to leave them feeling somewhat supported, or at least without feeling like I was being shafted.
And I've been in rooms with people who don't want to know the details but just want to know what "we" are going to fix — those guys have never been as good to work for. If they say "we" but leave you with the impression they may mean "you", it's bad.
[0] said scene, but really, really, watch the film if you never have:
https://www.americanrhetoric.com/MovieSpeeches/moviespeechma...