The argument is that we're istinctually biased when assessing whether an entity is what we consider intelligent/living, or not.

It'd be simpler in the post to contrast, say, an "electronic" alien driven by AI, versus a syntethic machine, made by humans, with the same (hypothetical) AI; we'd istinctually recognize the former as intelligent/living, but not the latter.

The post is essentially retelling the carbon chauvinism concept.