I mean, somebody can give you a block on gold unpolished and unwrapped. Sure, you can say, "How dare you give me that gold unwrapped! There is no way I am taking it. I demand you give that wrapped up property in fancy paper and tied with a ribbon." Sure you can say that. But the loss will be all yours. You got the shit anyway and gained no gold...
So the point is, if it the speaker who has to gain something by getting their point across, sure. They will have to be diplomatic. But when someone, halfway across the world is teaching you something from their ridiculously singular experience, seemingly in a rude way...
You shut up and listen.