Traditionally code would be written as a tool to achieve a specific output. If you automate the task of generating a particular piece of code, you still did all the work, or at least defined it pprecisely. While I don't see AI as an independent mind (yet) it seems independent enough from the person who prompts it to say the prompter doesn't own the output. I'm so 100 percent on what I just wrote, but it seems reasonable enough to say the precedent you mention may not apply.