"ChatGPT doesn't let you share chats with images (why?)"
Probably because if you uploaded pornography (or illegal imagery) to ChatGPT and then shared a link with the world it would be embarrassing for OpenAI.
My guess is that OpenAI are risk averse on this particular issue, because people could come up with some very creative awful scenarios with ChatGPT and image analysis. "Which of these people looks the most stupid" plus a jailbreak would be instant negative press.
Probably because if you uploaded pornography (or illegal imagery) to ChatGPT and then shared a link with the world it would be embarrassing for OpenAI.