They need to alter the proportions of the decision makers at least as much as the people in those movies.
As long as the leadership and decision-makers are majority white, they will continue to either collectively favor white pp or to act as if acknowledging POCs is some sort of favor to us. Doing the right thing means that some of these power players cede their OWN positions to POCs, and that's really what they should be doing. Zero-sum settings require this sort of action, because it is in zero-sum, competitive settings where we see that privilege is most infested, where privileged pp keep helping each other. They must cede decision-making positions bc these are grossly overdominated by white pp.
The rest will follow once the leadership is heterogenous.