100% misunderstanding :-).
Imagine you have A folder, it is shared. What will happen (currently) if you just copy subdirectories to A -- B, C, D . Will they be shared? No. Because currently directory is shared only if user says so explicitly.
This wish is about new feature -- autoshare (or more exactly auto-recursive-share). If A would be in such mode, even if you add directories to it, amule automatically add them as shared too.
Since there is no such feature with each directory added you have to manually share it (if you like, of course).
PS. So it is not a problem for flat directory structure, but with nested directories. Currently there is no workaround for that --> you add directory, there is no chance it will be automatically shared.