Dock always on top in fullscreen mode

I have to ask: why? What do you gain by giving away a valuable screen real estate for something that is not being used?

The Dock can always be activated by moving the cursor to its general area.

Why have it always visible? And in fullscreen to boot, where one is supposed to be more focused on one application?

Indeed, I fail to see why would the Dock should be kept visible all the time, regardless of full screen.

It wastes screen space, and is kind of an eyesore too.

It's not possible not to mention Full Screen would no longer be full screen since the Dock would be covering part of the screen.