Just like any other (personally or socially) constructed orientation,
the „centre“/middle too is an extreme point
(without being an essential point [a point having&using no concrete space [[and being probably timeless]]).
Localised arbitrarily somewhere in the symbolic space. Just like the (so-named) extremes, like anti-extremes, non-extremes etc. Or „ultimately“* any other imagination. There’s no objective gauge, no line segment where we can measure a centre, a middle, a whatever. Besides arbitrary, secondary, standards we set and keep them for reliability and to construct us something calming and secondarily (self-affirmingly, in/out-grouply defined) stable. Thus, and generally: Primarily, the middle and all other such localisation and hierarchisation concepts, are empty (but still functional?) when their arbitrary secondary constructions are removed (-> to the societal stock/warehouse of constructions and concepts).
* ‚Ultimately‘ itself is ultimately centreless and frameless. It’s theoretical essence (in human thinking for example formulatable as: it’s objective meaning), if traces (for example waves etc.) of that exist at all–besides its instrumentalisability for arbitrary secondary purposes–, is to our human (bodily, embodied, mental, cognitive) receptors and to us as constructors of our own worlds: base-less. Ultimately has no end, the space curves and you can travel along it without reaching the end, like a ship sailing around the earth. With then meeting repetitions or iterations (for example like formulated by Deleuze, or Derrida) that are structurally the same, or rhizomatically and emergently different.