There are a lot of bad arguments in this. My biggest problem is that he wants to claim that he knows the truth (AIs do not have rights, feelings, or consciousness), but all of his arguments point to something else (we have no clue).

It's in the training data? Training it to say "I'm just a LLM, I have no feelings" is the same bias.

Anthropomorphization? Completely disregarding the possibility of consciousness is no better.

Consciousness is very likely biological? We only have evidence of biological life due to our circumstances, but observation is not the same as truth. Every belief can be invalidated. That's the foundation of science!