Why do you expect an AI to cite it's source? Humans are allowed to use and profit on knowledge they've learned from any and all sources without having to menti

Why do you expect an AI to cite it's source? Humans are allowed to use and profit on knowledge they've learned from any and all sources without having to mention or even remember their sources. Yes, we all agree that it's better if they do remember and mention their sources, but we don't sue them for failing to do so.