I disagree. He's not saying "if we allow relevant job ads, clearly we must allow irrelevant job ads." He's demonstrating that "anything of or relating to real-world jobs [is relevant to LW]" is false. It's possible that Eliezer intended "anything relating to real-world jobs whose field overlaps with the topics of LW," but I'd still disagree with him for the reasons mentioned above. Everyone here is presumably interested in the topics of LW; only a subset

are unemployed, seeking work, fit the qualifications, and live in the area

and those are the only ones to whom this post is relevant. I don't object to it being posted at all, but the promotion doesn't seem appropriate, given the above.