The term "artist" here is being used kind of loosely. They're doing the bare minimum you need to turn a skeleton into a living creature. Good artistic representations require a lot more imagination, beyond what we scientifically know. You can get clues by looking at already existing animals and how they relate to their skeletons. Which gives an idea of how much not bone material those creatures might have. No you won't know exactly how much they did, but that's not really being represented by skin wrapping either is it. Better to try and go for something believable rather than the bare minimum.
Funny
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Fun fact, the reason some dinosaurs are depicted with lips is because the asymetrical wear on their teeth doesn't match with modern equivalent's that have exposed teeth, meaning they had "labial scale" lips.

Image owned by Mark P. Witton
Hippos will absolutely fuck you up, though.
I want to take it one step further.

And no, I don't care if there's good reason to believe that Tyrannosaurs weren't fluffy like owls, I still want a decent artist's depiction of a T. rex with owl-level fluff.

Artist's depiction =|= AI slop

A giant murder sparrow would be horrifying as fuck, ngl.
Anyone who thinks feathered dinosaurs are somehow less terrifying need to be locked in a room with a cassowary
Or a secretary bird