[belorn]

It is a major simplification to put the political spectrum on a single line (https://en.wikipedia.org/wiki/Political_spectrum). If we put it as a triangle, the Overton window can be as far from left to right as left/right is to the middle.

The Overton window is not involved in defining the middle, and the middle definitively do not need to agree 50% with any specific decision done by the left or right.