I find this interesting. I mean, personally, I agree that the word 'we' quite often makes it sound like the speaker is (to me, offensively) including people they oughtn't in the group they are speaking of. Especially when talking about my company, I feel like I'm weaselling when I say 'we' - like saying "Mistakes were made" (I mean, sometimes I say that, but when I do, I'm saying it, you know, for effect. Making fun of the idea of trying to dodge responsibility for a mistake. I mean, after Reagan said it in all seriousness, I don't think the phrase could be used non-ironically.)
But, I often find that people that are better 'team players' than I am? they prefer the 'we' - one of the people I work with gets irritated when I try to break 'we' down into him or me.
"We're in it together!" is what he says. All our company activities are supported by both of us. And, while that's not completely true, it's mostly true of most things. His 'we' I think, is just as valid as my 'there is only you and me' - it's just a different way of looking at cooperation.
He just has a much more communal way of thinking, while I (I say in part because I have more experience with communal decision making, but I don't know how true that is) prefer to think in a more structured hierarchical way, where a person has responsibility for a task and they delegate off parts of that task.