First, emptying the Junk E-mail folder (i.e., right-clickEmpty Junk
E-mail) does not move anything to the Deleted Items bin. Emptying the
Junk E-mail folder is a permanent delete for the items in it.

You're incorrect. Emptying Junk sends it to the bin - on my machine anyway.

Secind, by definition
there should be nothing "useful" in the Deleted Items folder, just like
there's nothing useful in the wastebasket in your bathroom or kitchen,
since you don't put anything in a wastebasket that you want to keep.

Eh? It is easy to accidentally delete useful items, particularly if you
synchronise with a PDA.