So true, so true. Every time I think I've got my structure set up properly, I then do something in haste, and can't find it later. Power user and file manager are two totally different things.
But, if the person doesn’t know where the file is, Finder has a “Recent” virtual folder right a the top that’ll list all files the person worked on most recent on the top. I often use it to get to screenshots. There’s also a lot of basic operations that are there since the 1990s any power user would know.