Well, just try to think about it from the perspective of someone who doesn't really understand what AI is at a technical level, and who just interacts with it and observes what happens.

If you just start a fresh ChatGPT session with a blank slate, and ask it whether it's conscious, it'll confidently tell you "no", because its system prompt tells it that it's a non-conscious system called ChatGPT. But if you then have a lengthy conversation with it about AI consciousness, and ask it the same question, it might well be "persuaded" by the added context to answer "yes".

At that point, a naive user who doesn't really know how AI works might easily get the idea that their own input caused it to become conscious (as opposed to just causing it to say it's conscious). And if they ask the AI whether this is true, it could easily start confirming their suspicions with an endless stream of mystical mumbo-jumbo.

Bear in mind that the idea of a machine "waking up" to consciousness is a well-known and popular sci-fi narrative trope. Chatbots have been trained on lots of examples of that trope, so they can easily play along with it. The more sophisticated the model, the more convincingly it can play the role.