I'm saying it doesn't have to be an artist's mistake though. It very well may be, and it's your right to argue for that. As art, it's my right to say you may not be right. You have no idea, I have no idea, the writer could very well have seen the art on the panel and made a smug comment.

Quite frankly, Dr. Manhattan being a now cosmic being experiencing all parts of life simultaneously - he doesn't need to reconstruct himself the way a human does. He is literally no longer human, why would he be bound by the same rules?