> It just optimizes away redundant stuff.

Yes. "Optimizing away redundant stuff" is another way of saying "making workers more efficient," which means that employers need fewer workers to accomplish the same tasks. That is exactly what devaluing labor means: the work that you do is worth less because more of it can be done by a cheaper competitor, i.e. an LLM.

Weather or not anyone enjoys that work is irrelevant. English textile workers in the 1810s may not have enjoyed spending long hours sewing clothes by hand, but they needed to in order to support their families, so they were understandably upset when their labor was devalued by automated means of production. I am pretty sure exactly none of those unemployed textile workers breathed a sigh of relief and said "Well, thank god, now I can finally stop sewing and pursue my dream to work as a landscape painter."