Moreover, when you wrote it yourself, you are intellectually responsible, you can defend it, while if the LLM wrote it for you, nobody is really responsible: The LLM didn't write it "out of its own motivation", it was merely extrapolating your prompt; and you only provided the prompt, not the extrapolation.

So the intellectual responsibility is diluted to a substantial degree: The text is not the opinion of anyone who can be expected to honestly defend it. It's bullshit in the technical sense.