I have no reason to be confused or annoyed. It doesn't matter to me that the Mac that sits on my desk matches the iPhone I carry in my pocket or the iPad that I carry around in my hand/backpack.
Now my Watch, iMac, and iPad are all silver/aluminum. My iPhone is Space Gray. Altogether, they match or compliment each other closely enough - black and silver are a natural color pair. But yes, if I wanted all "gold" it would be much harder to make a match.
Color is a matter of fashion, and not everyone will like a particular shade. That's probably why there's no standardization of those colors at Apple - one person might buy one shade of blue or gold but not like another. The colors vary from model to model and year to year for marketing reasons. For the most part there's little business benefit to sticking to one particular shade of any one color - varying the colors tends to find more buyers, rather than fewer.