Being accurate isn't the only desirable characteristic in a picture (Skill is not relevant to art). If that was the case, art wouldn't exist at all. Frequently life is not fair.
Max Bill, Nothing is more concrete or real than a zany basilisk on a concrete wall, his output is herculean.
What's the difference between silly and stupid ? We cannot be free of observed reality, without symbolic implications. You are equipped to puzzle out this tortuous visual poetry, bad poems make the webpage appear weightless, buried in the deep web.
Painting has always been the fetish medium of art history. Canvas stetched over wooden frames is quite good for witty paintings.
Van Doesburg, Concret Art
No artist's error becomes his own rule and obliges him to persist in it. Sloth pictures must be overworked paintings.
Thomas Hobbes, Ignorant images know how to make good paintings from bad art.
In a feat of artistic wizardry, painters laid down the rules to determine the proportions of the human body. All the drawing methods are laid bare, anyone who wants to challenge classical body proportions can do it.