Breaking eggs to make omelette sounds good unless you're the egg. There's an excellent quote from Thomas Friedman: "when you get laid off, the unemployment rate is not 3.4%, it's a 100%". It's great to fantasize about future utopian abundance, but most people live in the present and most will be presently ground to powder. All technologies have a barbelling effect. Redistribution of surplus does not happen by default. The tumult and disruption may last a decade or more. And the fruits, if we make it to the other side, will not be for this generation to enjoy. The textile workers did not cheer for the loom, because they were not the ones that enjoyed the joy of cheap Uniqlo or H&M t-shirts.
On point 2: Many people derive meaning and identity from their work. Acquiring expertise, feeling useful, contributing to society, honing your craft are all things that leads to a good life. It could be that after AI we will all write poetry in the morning, go fishing in the afternoon, and paint in the evenings, but I don't think most people are like this, it's certainly not the way I am wired.
On point 3: "utopian AI is so good that words can't describe it so it can't and shouldn't be stopped". I do not think utopian abundance is guaranteed just by copy-pasting data centers across the globe. There is a non-negligible chance that things go really badly.
Lastly, I think the usage of the word "class" shouldn't automatically be linked to "Marxist ideology". This is cheap rhetoric: "class" --> associated with Marx --> communist loonies of the 20th century --> therefore disregard all argument presented.