The "harm" is because of the uses that corporatism will put generative AI to, NOT because of generative AI itself (which is an awesome, if deeply misunderstood technology). People point fingers at the tools, rather than the culture making use of them, but this is an obvious and historically VERY common mistake.
Can AI harm consumers and workers? Yes! But that is because corporatism ALREADY harms consumers and workers, shamelessly exploiting them and calling it virtuous freedom. GenerativeAI will give them more ways to exploit workers and consumers, thus "harming" them.