If we are talking early early then it was because art wasn't a form of "art" it was a form of communication.
But a little later down the road, people did not understand the human body and could not paint one perfectly, and also painters loved to show perfection, as in, gold everywhere, or a kind a top a thousand bodies. Something like that. So yeah...
Well a gesture is body movement and body language is also how u show these body movements idk if that’s right
Can possibly be both depending on what’s the genre of music and what it contains
i personaly think no they shouldn't
