For what it’s worth, I suspect that right now the majority of people would agree with you. They would say that obviously ChatGPT isn’t conscious, based on their intuitions, but would struggle just like you are when pressed to explain their reasoning.
So I think it’s more than fine for you to have your views and share them, but I wouldn’t expect to have any influence or part in the conversations around whether AI is conscious if you can’t explain why (or simply refuse to). Which, again, is fine!
Side note: I also think that once we have AIs that are sufficiently advanced, the popular opinion will swing to “of course they’re conscious”, because again, most people are going almost entirely off their intuition rather than reasoning from first principles, just like you see to be.