Most of the indigenous people who I have met want to share their culture and are okay with earning a living by selling art that reflect their culture. They do not like it when others do the same, most likely due to a history of cultural misrepresentation, exploitation, and outright theft.

fwiw I think an important distinction is that you're talking about a majority group. It's probably different for the indigenous people that the Japanese Empire committed genocide against, like the Ainu