the problem cited in the article is performance. a "help" dialog shouldn't take several seconds to open, it shouldn't take foreground control, and you shouldn't have to wait for it to finish opening in order to close it. and you definitely shouldn't have to move your hand to the mouse to close something that was opened by an accidental keystroke.
if the view doesn't get obstructed and you could simply tap F1 a second time (or Esc) and instantly be back to what you were doing, i think the UX problem would be solved.
in firefox, i sometimes hit F12 on accident -- but i can just tap it again to close the dev tools, even if it hasn't finished loading. that's decent UX.