[Wuli]

“What is the mass of all of the buildings, structures, vehicles, digital watches, and road surfaces, man has made on the earth so far?”

They have not changed the mass of the earth. The materials were already part of the earth.

[lepton]

“What is the mass of all of the buildings, structures, vehicles, digital watches, and road surfaces, man has made on the earth so far?”

They have not changed the mass of the earth. The materials were already part of the earth.

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That’s not the point. The point is that I don’t think you understand how miniscule our total building efforts are to the mass of the moon - such that many multiples of human efforts would still be a trivial amount compared to the mass of the moon.