Ok, now I’ve finally come to a conclusion about this debate. When a human learns to draw or write in a particular style, there are no copyright issues. However, when a machine does the same, you need to compensate the people who made the training data. Here’s why.
The training data is an essential component of of the model. It’s like building a house with bricks you didn’t pay for. If you’re building something like a house, ship, software or a machine learning model, you need to pay for the materials that are required to build it.