[lloeki]

The iCloud Drive folder is indeed "just files" but it’s stored sort of hidden in a wickedly long path†. Firing up a terminal and cd’ing into ~/Dropbox is arguably easier than having to drag and drop a file in there from Finder just to have the correct path.

† "~/Library/Mobile Documents/com~apple~CloudDocs"

[nextlevelwizard]

How about ~/Desktop? That's mirrored in iCloud for sure. Possibly also other paths, but that's sort of hidden knowledge.

Usually when I use it I just drag files into the shortcut in Finder, but I guess that's a point for Dropbox. Of course you can just make symlink with ~/iCloud (I'm not at my Mac right now, but as I type this I have a feeling that there is some path in your home folder to iCloud or maybe I've already linked to it.)