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Notes -
You know what surprises me? I don't think I've seen a woodworking video where the woodworker does their own math. I understand mathing fractional inches takes a little bit more effort than decimal cm, but it's all still powers of two. And yet, almost everybody I watch whips out a cell phone, relies on CAD software, or avoids mathing entirely by marking their workpieces against the actual dimensions of the partially completed project.
Apparently that last method is actually the best as compounding errors/imprecision always throw off your calculations. But I feel like my point remains.
Did none of these people ever learn how to do fractions? Even 10-20 years ago when our education system supposedly functioned? I doubt it. I doubt it's just students that are being cognitively mutilated.
If you want to see lots of math and geometry, look at the folks doing (manual) machine shop stuff. Things like "the drawing gives this weird dimension relative to another face over there: I need to include adjustments for tolerance over the separate steps to make all the intermediate features". Lots of concerns about reference faces, accumulating error, cutter geometry, and a fair amount of trigonometry.
Only professional cabinetry woodworkers are going to care about repeatability: for everyone else, a single piece of furniture only needs to fit together by itself, not have interchangable parts.
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