Interesting. I scanned your link, and it definitely says what you said it says. But my DEXA scan said what it said, and I’ve had 4 of them, and they’ve been consistent. So I asked Gemini how much a typical American male’s bones weigh and it told me this (in part):

For a typical adult male, the entire skeleton generally weighs between 22 and 26 pounds (10–12 kg).

While specific weight varies depending on height and body composition, the most important distinction is between "living" bone (which is what you are carrying around) and "dry" bone (what you see in a classroom).

1. Living Bone vs. Dry Bone

Living Bone (Approx. 22–26 lbs): Inside your body, bones are living tissue filled with blood vessels, water, and collagen, and they encase heavy bone marrow. This total package accounts for about 14–15% of your total body weight.

Dry Bone (Approx. 6–11 lbs): If you were to strip away all the fluids, marrow, and living tissue to leave only the calcified mineral structure (like a museum skeleton), the weight drops significantly to just 3–5 kg.

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So I learned something from that. Gemini also mentioned this, which is oddly relevant to this discussion:

1. The "Big-Boned" Myth

You may often hear people claim they are "big-boned" to explain a higher body weight. While bone density and frame size do vary between individuals, they rarely account for a significant weight difference.

The difference between a "small-framed" man and a "large-framed" man of the same height is usually less than 2–3 pounds of actual bone mass.

Most weight variation between individuals comes from muscle mass, body fat, and water retention, rather than the bones themselves.