> So what's your unique contribution to this world - is it the prompt you once wrote

Why not? You're implying writing good prompts doesn't require effort or thought, which is false to me.

> Are you going to apply that knowledge of physics or computer science yourself, or will you just prompt the LLM again?

To write better prompt is a good reason to learn new things. It's so obvious that more knowledge and experience you have, the better results you get from LLMs.