I don't think deciding not to use LLMs makes you any more immune from automation, because other devs will.
If anything, assuming it really does increase productivity, it'd seem to me that the devs using LLMs would be safer than devs in the same domain that refuse.
> If it doesn't work
The extent to which a human using an LLM still produces buggy code should already be taken into account by assignments.
I'll answer my own rhetorical question: the human wins when (s)he creates value; by asking the right questions (crafting prompts better than the next person) and by recognizing deficiencies in the computer's output.