This leads me to believe that I do not fully understand the encryption process. After reading this, I now think that the files themselves are not encrypted when uploaded; instead, the names are obfuscated using an encryption method. In my mind, this is the only thing that makes sense if you can perform a serverside-only move.
by default, rclone encrypts the contents of files and the filenames.
rclone offers a lot of flexibility.
--- you can encrypt the contents but not encrypt the filenames.
--- you can encrypt or obfuscate the filenames but not encrypt the contents.
rclone can server-side move the file, same as any other file.