This is a dangerous approach to the problem.
The fact that is difficult fo theorize what consciousness is doesn't mean we should assume everything is conscious until the opposite is proven.
Also, we don't assume other people is conscious because they behave like us, but we do because they are human like us
The second "problem" has nothing to do with LLM. We should treat even dolls with respect, because that respect has to do with us, not with the dolls value.