In your case, it isnt the output that matters. Your saying "I'm conscious" isn't why we attribute consciousness to you. We would do so regardless of your ability to verbalise anything in particular.
Your radical behaviourism seems an advantage to you when you want to delete one disfavoured part of copyright law, but I assure you, it isn't in your interest. It doesnt universalise well at all. You do not want to be defined by how you happen to verbalise anything, unmoored from your intention, goals, and so on.
The law, and society, imparts much to you that is never measured and much that is unmeasurable. What can be measured is, at least, extremely ambiguous with respect to those mental states which are being attributed. Because we do not attribute mental states by what people say -- this plays very little role (consider what a mess this would make of watching movies). And none of course in the large number of animals which share relevant mental states.
Nothing of relevance is measured by an LLM's output. It is highly unambigious: the LLM has no mental states, and thus is irrelevant to the law, morality, society and everything else.
It's a obcene sort of self-injury to assume that whatever kind of radical behaviourism is necessary to hype the LLM is the right sort. Hype for LLMs does not lead to a credible theory of minds.