The silliest argument is "well if we figure out how the human brain works then we can claim it's not consciousness either!"
We made the word to describe our (and other mammals, birds, etc). No matter how deeply we understand that concept of consciousness will invalidate that.
It's impossible to actually understand how an LLM works and genuinely believe it's conscious.
It's a bunch of vectors and multiplication. That's literally it.
"We don't know what they're doing"
lmfao yes, yes we do.