Forgetting the chainstay is typical of asking random people to draw a bicycle.
https://www.gianlucagimini.it/portfolio-item/velocipedia/
> most ended up drawing something that was pretty far off from a regular men’s bicycle
Thanks for the delightful Velocipedia
Although every single render of those has pedals on the correct side as opposed to the Gemini optical illusion back pedal that tries to be both on the other side of the central gear and infront of the back wheel.
Not really a criticism but an interesting point that you would never expect a human to make that mistake even in a bad drawing.
Asking random people to write SVG gives even worse results