WinRAR why the temporary files cannot be deleted

Why winrar temporary files that are just uncompressed in the Windows Temp folder cannot be automatically deleted by winrar? Even if the WinRAR software has been turned off. This is because files in a temporary folder are generated when you extract files from a compressed package or open a compressed file with an external viewer by using the Drag method. In some cases the file may still be used by other software after the WinRAR shutdown, and there is no reliable way to detect if the external program still needs these uncompressed files. So winrar won't delete them immediately. And the next time you run WinRAR, all temporary folders or files for more than one hour will be deleted. If you do not want to use the temporary folder when you extract the files, you can also use the "Extract to" command in WinRAR graphics mode or the "extract to" item with the associated menu, rather than the drag method.