Most of the code my friends and I write, isn't original. And it's not just people who make $50K/year. Obviously LLM-assisted code writing is still in its infancy, but it has made a lot of mundane things a breeze already. It sucks that one has to know its shortcomings to make it actually useful for yourself (e.g. I won't ask it to write a context-aware function right away, but I know it's great at generating stubs). But we'll get there, I think.
If you want big bucks you are writing original code, no two ways about it