Ultimately information has to come from somewhere. If something has no information about what a "car" is, it cannot paint a car more successfully than a random guess. When you draw a car or write an algorithm to do so, you'll be slightly affected by the existing car designs you've seen. It's not a limitation specific to AI - it's just more obscured for humans since there's no explicit searchable database of all the cars you've glanced at.
Whether it was affected by (and dependant on in aggregate) prior work is not the standard for copyright infringement, and I'd claim would implicate essentially all action as infringement. Instead, it should be judged by whether there's substantial similarity - and if there is substantial similarity, then by the factors of fair use.