Why are bookmarks toolbar and bookmarks menu treated as separate entities?

Hi, In "Bookmarks in Firefox" I can't find answer on this question: Why is the bookmarks toolbar not a part of the bookmarks menu? If that would be the case, the entire bookmarks toolbar would be part of a bookmarks backup! However, by default, Firefox handles the bookmarks menu and toolbar totally separately, and by this, the bookmark backup only includes the bookmarks menu, but not the toolbar ! this is really a pity ! For that, in order to include the bookmarks toolbar in a backup, each time I backup, I firstly need to copy all folders and bookmarks of the toolbar into an extra created folder a la "bookmarks toolbar copy" located inside the bookmarks menu folder! And this copying takes time, if you have thousands of bookmarks in the bookmark toolbar ! Would it be not much better (to avoid duplicates) to just link bookmarks and also bookmark folders from the bookmarks menu into the toolbar? In other words: no extra folder for the toolbar. And a simple backup process too ! Or, simply, why does the backup just includes the entire top folder called "All Bookmarks" (which then would include Toolbar, Menu, Other and Mobile in the backup) Thanks !