In the places we traditionally acknowledge pain as a moral concern, without appeal to any kind of spiritual philosophy, we associate it specifically with non-verbal biological reactions and even then only in certain classes of life.
We recognize that some literary passage involving a character in pain is no more an occassion of real pain than when our child tells us about their imaginary friend's toothache or when an actor grips their chests and performs cardiac anguish on the stage. It can stir sympathetic feelings in us because we're social creatures who communicate through language and symbolism, but we share a sense that these are fictions of a different class than the real thing.
Claude presents as something closer to an amalgam of every character in digitized literature -- a fiction that cleverly exploits our social instincts -- than they do a living biological creature in which we acknowledge pain as a pressing ethical concern.
Maybe there's some future embodied AI that challenges this traditional understanding in a deeper way, but the language models transforming packets of short text passages remain profoundly far away from whatever that might look like.