> Any monopoly with viable economics for profit with no threat of competition yields monopoly profits

"With viable economics" is the point.

My "ludicrous statement" is a back-of-the-envelope test for whether an industry is nonsense. For comparison, consolidating all of the Pets.com competitors in the late 1990s would not have yielded a profitable company.

>"...viable economics for profit..."

OP did not include this requirement in their post because doing so would make the claim trivially true.