I have my Mac settings configured so that clicking the wallpaper hides my open windows to show the desktop.
System Settings > Desktop & Dock > Click wallpaper to show desktop>Always
However, when I click on an empty space on my desktop, it immediately pulls my previously opened windows right back to the front.
Essentially, clicking the empty wallpaper acts like a toggle button. I can never just click and stay on a clean, empty desktop; if I click it a second time, all my apps rush back and cover my screen.