Well art galleries, at least at first, never promised things like "representing the world" or even be for mass consumption. The average person could have easily lived and died never seeing the paintings or hearing chamber music or a symphony (depends on what era).
Paintings were a patron-based good that was producing family portraits and things for rich people that the excess of eventually got put into their country houses, that people could come see, forming the first "art galleries".
It is a modern and internationalist view projected backwards in time to have these expectations, and you will find even less worldly representation in the art of non-Europeans from that time, focusing on their own. (Nothing wrong with that).
Contrast what non-European art was doing with the wealthy European Baroque patron who was buying stuff from China and Africa, travelling around the world lot, admixture of various European cultures to produce baroque music (also didnt have copyright so "sharing" common between composers building on each other). This was very diverse and worldly for that time.
Paintings were a patron-based good that was producing family portraits and things for rich people that the excess of eventually got put into their country houses, that people could come see, forming the first "art galleries".
It is a modern and internationalist view projected backwards in time to have these expectations, and you will find even less worldly representation in the art of non-Europeans from that time, focusing on their own. (Nothing wrong with that).
Contrast what non-European art was doing with the wealthy European Baroque patron who was buying stuff from China and Africa, travelling around the world lot, admixture of various European cultures to produce baroque music (also didnt have copyright so "sharing" common between composers building on each other). This was very diverse and worldly for that time.