Correct

This is a terrible idea. Very easy to circumvent, doesn't actually help the training sources.

To speak of AI models being "made public domain" is to presuppose that the AI models in question are covered by some branch of intellectual property. Has it been established whether AI models (even those trained on properly licensed content) even are covered by some branch of intellectual property in any particular jurisdiction(s)? Or maybe by "public domain" the author means that they should be required to publish the weights and also that they shouldn't get any trade secret protections related to those weights?