Or they may be something in between - an imaginative artists rendering based on observed fossil remains.
We can find the fossilized remains of Stegosaurus. If they lived with, and were hunted by men, where are the fossilized remains of those men?
I don’t remember stating that any man (or woman) lived with (now that WOULD be dangerous) or hunted a Stegosaurus. You do know, however, that fossils are RARE items? Indeed the vast majority of creatures don’t end up fossilized.
Are you sure that’s a pictograph of a Stegosaurus? Looks more Robocop riding a rhino.