Acknowledging that you're a one-man business and thus you're the sole responsible for how your business is conducted is not remotely similar to the "how to draw

Acknowledging that you're a one-man business and thus you're the sole responsible for how your business is conducted is not remotely similar to the "how to draw an owl" meme. You only accept what you're willing to accept, and if a client decides to play you for a fool then the only person responsible for keeping a business arrangement that is clearly bad for you and works against your personal interests is yourself.