Not choosing exactly what words you want to use is something very different than not completing a thought IMO. When you speak you may not know exactly which words you're going to use to communicate an idea, but you already know the idea that you're communicating. By contrast LLMs have no such concept as an idea - only words.
And it's also important that language and words are just another invention of humanity. We achieved plenty before we had any meaningful language whatsoever. At the bare minimum we reproduced - and think about all that's involved in forming a relationship, having a child, and then successfully raising that child for them to go on and do the same, all without any sort of language. It emphasizes that ideas and language are two very different concepts, at least for humans.
And it's also important that language and words are just another invention of humanity. We achieved plenty before we had any meaningful language whatsoever. At the bare minimum we reproduced - and think about all that's involved in forming a relationship, having a child, and then successfully raising that child for them to go on and do the same, all without any sort of language. It emphasizes that ideas and language are two very different concepts, at least for humans.