This then implies that in the EU, AI-generated content cannot have a license applied? MIT, GPL, CC, etc?
It's reasonable to expect this to hold for all Berne Convention countries.
All licenses are unenforceable if you don't hold the copyright, since you don't have a copyright to license. And attempting to do so would probably be perjury.
Not to even mention moral rights on how such work can or can not be changed if it would be disparaging for example...