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The Overton window is outside the bounds of the Overton window. It's a rhetorical device masquerading as political theory. It attempts to put bounds around the acceptability of political discourse. You can try to move or stretch the window if you don't like where it is, or try to figure out where it is and meekly stay within it. If you're in politics, you'd like to control it, keep your opponents within it, and move it in your direction.

The idea and expression of where the Overton window is seems to sharply depart from what Actual People (tm) think and say about the issues. As a box, it's far too small to be useful.

Let's deprecate it and move on to more fluid ways of thinking about public discourse.