Yeah people get too caught up in the marketing-hype of AI as if it's a magical thinking lifeform. So far, it is not. It's a device, a tool. Devices don't own things.
Generating art costs money - electricity to train models and rent/buy the hardware, requires expertise in neural nets, tons of training data from the public domain or privately created, lots of experimenting and fiddling with the parameters, manual curation of the output ...
why should the human who invested all this work not be entitled to the copyright?