Do you take full credit for the output of the LLM ? If you accept the rewards for what you do with the LLM's output, it's probably ethical that you also take on the risks.

That's only true if the risks are reasonable, understood, and expected. Driving a car is risky, but if someone sells you a car that goes flying into incoming traffic because of a flaw in the design the car company is to blame. "Drivers know cars are dangerous and risky" isn't acceptable.