> If it were, who'd keep buying the stupid things?

The same people who buy books about healing crystals, who donate to televangelists, who go to reiki "healers" and chiropractors, who believe in tarot firmly, etc.

Those people aren't in something resembling a zero-sum game, so they don't really make sense. Chiropractors sell back cracks, and the people buying that get exactly what they want.