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> ... if we were to extract the rotational energy just to supply 1% of the world's energy consumption, the rotation of the Earth would lock to the Moon in about 1000 years ... and most life on Earth could be wiped out.

Important safety tip.

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There's an award-winning sci-fi book with a tidally locked planet as its premise: https://www.goodreads.com/en/book/show/37534907

The City in the Middle of the Night by Charlie Jane Anders if the link does not work for you either.

But is it possible to extract that much energy from the tides with current techniques? That starting point in their math may be invalid. But it is good to know that not very much energy is available from the tides.

If its not possible then we really shouldn't be very interested in it because it can't get us very far, 1% is a rounding error towards solving the CO2 PPM causing climate change.

You missed the part where he assumed that energy demand will increase 400 million times and took 1 percent of that

The difference any individual (or even a single small to medium sized business) can make is never more than a rounding error either - I'm not convinced that means we shouldn't be interested in such changes.

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