@riley I agree with your conclusion but not your semantics.
"Being right" doesn't mean "providing information", it means "making a true statement".
Twice a day a broken clock is making a true statement about the world, hence it is right.
What the proverb teaches us is that a system making a true statement does not imply that other statements made by the system are true. I agree that this definitely applies to LLMs that generate text. So I think invoking the proverb is appropriate