That metaphor doesn't really work. It's a settlement, not a punishment, and this is payment, not a fine. Legally it's more like "The store wasn't open, so I took the items from the lot and paid them later".
It's not the way we expect people to do business under normal circumstances, but in new markets with new products? I guess I don't see much actually wrong with this. Authors still get paid a price they were willing to accept, and Anthropic didn't need to wait years to come to an agreement (again, publishers weren't actually selling what AI companies needed to buy!) before training their LLMs.