Linux for computer-illiterates

It seems that even after a decade of weekly use a computer-illiterate has not been able to understand the concept of a file system (directories and files, etc.).

Are there some projects that make Linux work for those people? For example, I am thinking of things like putting text on a horizontal scrollbar literally saying "click this location on the screen (it's called a scrollbar) to see more files" in a file chooser dialog.

Perhaps LibreOffice's KDE file chooser is just too complicated with all the default styling (a horizontal scrollbar is also super low in height). To be honest, I think it sucks too, because of what I think are bugs (if you scroll to the right with the keyboard, I think it selects a file in the old position with the mouse cursor, scrolling back to the previous position).