reducing the probability of the top weighted words the LLM chooses from

My feeling is that a writer who adjusts their word choice to present a particular way is definitionally behaving inauthentically. I would characterize such writing as "slop" even if it's human made, because it was still heavily influenced by how LLMs "write".

Put another way- I don't believe that "not worrying about appearing as an LLM" is "giving up", I think it's a recognition that an LLM is not capable of fighting you in the first place. If you, a creative soul, allow fear of "coming off a certain way" (ANY way) to determine how you write, you have already lost.