And if your output isn't distinct enough from the inputs, you too aren't allowed to claim copyright or sell your work without proper licensing.
With the AI we can at least be 100% certain of which input you trained it on and under which licens, making the whole a lot easier to deal with, as compared to humans. The liability is the same, but it's much easier to avoid legal implications, so why not play ball and ensure that you have the correct licenses?