I have solved the problem with this bar if you right-click the bar when it pops up it will go away its very useful! Now it won't annoy you as much!
I'll draw a comparison to setting the Taskbar to Auto-hide...
You, actually, can, but, do not need to Rt Clk the (APP) Exit Bar. If you just touch it & back off it disappears... until you touch the mouse/cursor to the Top Edge, again, which causes it to reappear... pretty much like a Taskbar on Auto-hide. You have raised a good point, though; it other words, it's only 'there' if & when you ask for it, want or need it. Poke it & back off & it's gone, until you poke @ the Top Edge, again to use it.
Cheers,
Drew