The discussion the post has created is still valuable even we don’t know the motivations behind the post. That was true before LLMs as well (people lie and exaggerate on the internet all the time).

Personally I give the benefit of the doubt to a post I suspect of being LLM if there isn’t an obvious harm (for example, the user shilling a product in the comments). There are still some benign reasons to use LLMs for posts like these.