I think the point of the commentator above is that there are two extreme narratives that start each start with an uncontroversial assumption and then taking it to a pretty wild place. One narrative takes the assumption that brains are just matter so it should be possible to engineer consciousness and then argues that LLMs are conscious. The other takes the assumption that LLMs aren't conscious but then argues that because they aren't we won't ever be able to make anything conscious.

I don't actually think the commentator you responded to is arguing for either of these narratives and I thought it was a pretty useful way to look at some of these arguments.