To be fair, businesses should assume that customers actually "want" what they create demand for. In the case of misleading or dangerously addictive products, regulation should fall to government, because that's the only actor that can prevent a race to the bottom.
Because all people everywhere are psychopaths who will stab you for $5 if they can get away with it? If you take that attitude, why even go to "work" or run a "business"? It'd be so much more efficient to just stab-stab-stab and take the money directly.
To be fair, organized predatory behavior is to be expected?
joke- The World Council of Animals meeting completes with morning sessions with "OK great, now who is for lunch?"
The folks who succeed most in business are the type who have an intuition for what's best. They're not some automaton reading too far into and amplifying the imperfect and shallow signals of "demand" in a marketplace.