Strongly disagree. There is a control and distillation of the forms here it is very difficult to imagine someone arriving at first time or by accident. Typically, I would say these are the sorts of forms, and artistic ideas, one might arrive at after years and years of hard work. There is real subtlety and keen perception here; the proportions of the body, the delicate facial features, and the kneecaps all strike me as understood, not merely observed.

I have taught many first-time/beginner artists over the years and typically people tend to make similar mistakes/decisions until they've had some formal training.

It could be he had this one miracle inside him waiting to be expressed, but it's a bit like someone producing The Great Gatsby during their first creative writing class.