Most likely the mouse position will directly correspond to an in-game location, though.
This view you're speaking about kind of opens up weird venues, though. If I write a program separate from the game, and I have it read the game's memory and draw dots over the game window where objects are, would that then be okay since it's not technically part of the game?
I think the mouse pointer deliberation is also affected by the fact that it is on the exact same output device as your bit. Not only that, but also often in a way where it's indistinguishable from the case where your bit area would actually have explicitly and directly output the pointer graphic.