If AI code is non-copyrightable, does this not achieve the aims of copyleft by different means? I'm playing a bit fast and loose here but there's a solid idea

If AI code is non-copyrightable, does this not achieve the aims of copyleft by different means? I'm playing a bit fast and loose here but there's a solid idea at the heart of this statement - I'm just on the cusp of going to bed so wanted to post a placeholder until tomorrow. The gist is "what do copyleft licences aim to achieve as an end goal - and what would non-copyrightable code mean in that broader context?"