Well I suppose two points:

1) Transexualism and congenital analgesia are both things, so that isn't a meaningful test of consciousness if that is what you are going for.

2) I personally would be extremely upset ... but anything going on with me being extremely upset can be explained with analogy to ChatGPT + a few hardware generations + maybe some minor tweaks that are easy to foresee but not yet researched. Everything that would happen would be built up from basic stimulus-response's mediated by a big neural net and a bit of memory.

These ideas aren't that new, there have been schools of Buddhist thought that have been exploring them for around 2,500 years if you want a group that has thought through this more thoroughly. Probably other traditions that I haven't met yet. It is just that the latest LLMs have really put some practical we-know-because-we-have-done-it muscle behind what was already a strong theory.

Are you arguing that you don't exist? You seem to be

That'd be a reasonable interpretation. Although a slightly more palatable take is that I'm arguing I don't exist independently of anything else. It is safe to say something exists because, otherwise HN comments don't get processed. But the idea that we exist as independent perspectives is probably an evolutionary illusion. Or alternatively, if we do exist as independent perspectives then we appear to be an uncomfortably short step away from GPUs being able to do that too using nothing much more than electricity, circuits and matrices. There doesn't seem to be anything special going on.

I'm not confident enough (yet?) to take that all the way to its logical conclusions in how I live, but I think the evidence is strongest for that interpretation.