[xmonad] tweaking xmonad into a reparenting window manager

Hi! Is there some fundamental reason why Xmonad is non-reparenting? My current (naive) understanding is that Xmonad does not reparent the windows simply as a small optimization (why create a second window if you can live with one window just fine). If that's the case, then adding a tweak that allows Xmonad to do reparenting should be doable. However I understand that it will be non-trivial undertaking, so I wanted advice of more experienced developers before I sink in a lot of time to find out that this is fundamentally impossible for some reason. Best regards, Platon Pronko