Yes, probably they need to simply talk about this possibility more, or more prominently.
If you already know what you're looking for, then feel free to simply search for it; you don't have to browse through the categories it might be in, or the subjects it ought to be listed in, or any of that. Likely the only reason why it isn't in the places you looked is just that nobody has gotten around to applying the right metadata to it. This is simply a fact of life; there are millions (or billions, if you squint a little) of items in the archive, and most of them don't have all the metadata that they ought to have.
I wouldn't worry about stepping on their toes by organizing things better. It's not actually a collection until someone organizes and curates it; until that happens it's just a pile of stuff. IA has always operated on the assumption that it's ok to just have a pile of stuff if the alternative is to have nothing at all. Given the size of the pile there's no way they could ever organize everything themselves, even assuming that there's one obvious right way to organize things.
If you already know what you're looking for, then feel free to simply search for it; you don't have to browse through the categories it might be in, or the subjects it ought to be listed in, or any of that. Likely the only reason why it isn't in the places you looked is just that nobody has gotten around to applying the right metadata to it. This is simply a fact of life; there are millions (or billions, if you squint a little) of items in the archive, and most of them don't have all the metadata that they ought to have.
I wouldn't worry about stepping on their toes by organizing things better. It's not actually a collection until someone organizes and curates it; until that happens it's just a pile of stuff. IA has always operated on the assumption that it's ok to just have a pile of stuff if the alternative is to have nothing at all. Given the size of the pile there's no way they could ever organize everything themselves, even assuming that there's one obvious right way to organize things.