I think copyright claims are questionable at best, since copyright only protects the expression and not the ideas and LLM's can change the stylistic details commonly associated with expression. But I think there is a good argument for trademark dilution because the LLM is taking Forbes' high-quality journalism and associating it with a third-party product that could indeed be inferior (e.g. the LLM could have introduced inaccuracies). This was not an issue with search snippets where it could be argued that quotations were exact and faithful representations. The solution is not to kill AI companies but to make them worthless - would you trust news from a shady website with a reputation for not doing any fact checking?