@thomasfuchs It sounds like you're thinking of "the work" as a static thing. Like, "an article covering the most recent days of the war in Ukraine to our previous high standards". But when people are replaced with AI like this, "the work" ends up being very malleable, and frequently gets redefined as "500 words on the war in Ukraine, rephrase these sources PASTE PASTE PASTE".
So the job, journalist, is replaced because the work, journalism, is replaced.