What's really interesting is that it's something both extremely hard to get right, and also super easy to diagnose as "wrong" when not done properly: you need a lot of training to design convincing hands but anyone can judge you for bad hands.
Yes. This is actually why life drawing of models is such a good exercise. You can draw a tree or a house badly in the sense that it doesn't (say) have the proportions of the original but it can still look okay to someone who hasn't seen the original. But draw a person with their eyes too close to the top of the head and it immediately screams 'wrong'
