A lot of these look like children. Nowhere in the article is it mentioned that a lot of these look like children. No one in the comments has brought up that a lot of these look like children. A lot of these look like children.
I could bring up old racial stereotypes regarding Asian people to further bolster this point but I think most people are aware of this.
[0] https://www.apa.org/news/press/releases/2014/03/black-boys-o...
So you're not crazy. These are really young looking. It is probably just representative of the dataset. The dataset itself wasn't chosen for any malicious reason, the people who like this stuff just happen to be very prolific artists so there's a machine learning scale amount of it.
Of course, it's just my perception and your interpretation may be different.