Comment by direwolf20

Licenses determine the outcome of copyright lawsuits. If there's no copyright lawsuit, nobody looks at the license.

Licenses determine whether a copyright lawsuit is likely to happen. Most entities won't sue you if they expect to lose. But they are not the only deciding factor. Some entities never sue, which means you don't have to follow their licenses.

Sometimes they don't sue because they don't think they can prove you infringed copyright, even if you did. Even if AI is found to be copyright infringement in general, that won't mean every output is a copyright infringement of every input. Writing C code wouldn't be copyright infringement of Harry Potter. The entity suing you would still have to prove that you infringed.