Disagree. People with the Pinocchio syndrome, or "Pinocchios," can speculate too. The witness who thought that he had seen Ho Sang could've simply been mistaken. He probably was mistaken, considering that they just found Ho Sang's body. He merely believed it to be true; this doesn't mean it was.
Dal Po argues (in his rage) that Pinocchios and reporters should be careful with their words, knowing that people would take what they said to be the absolute
In Ha argues that Pinocchios and reporters have a duty to say what they think to be true. I'm more on Dal Po's side than In Ha's here. Just because you think something is true doesn't mean it is. By reporting your speculations, there's a chance you're spreading lies--dangerous ones at that. Like Dal Po said, Pinocchios and reporters should be careful with what they say to the public.
And then Dal Po makes it personal, which he shouldn't have, but I sympathize. Dal Po was probably hurt that In Ha, whom he wanted on his side, would imply that the reporters had no choice but to do what they did to his family. In his fury, he decides to hurt her back by calling her out on her Pinocchio syndrome and saying she can't be a reporter. Low blow, but understandable all the same.