This was only possible because a well thought out, working example could be used as reinforcement learning for the LLM to benchmark it's own development against and improve its output. Had this not already exists in it's current form, I doubt the LLM could have built this on its own.

So, I guess yes, if there is someone's hard work you can copy and steal and make your own, I guess that's true. But try to create something that no one has ever built yet.