I think there's a lack of critical thought at this stage with the white savior narrative.
The "white savior"/"magic negro" criticisms of narrative film were coined by Spike Lee in response to films like "Song of the South", "Legend of Bagger Vance", and "Green Mile" where no character development occurred.
That's a far cry from films like The Help (in which Emma Stone didn't even have the most screen time) or Green Book which had roughly equal time between. the two leads and it's about them having a difficult conversation.
I was at the Green Book screening on the festival circuit and the film drew applauses from a mixed audience including a Black teacher who asked how she could use it in her classroom, and an elderly Black man who wanted to tell his story from the south in reaction. That was before all the misguided twitter activists and woke film critics sought to ruin it with theories that I feel are critically unsound.
The point of art is to explore lives outside ourselves. It makes sense that a white director would want to put white characters and black characters in films together. The alternative is to segregate film so you avoid backlash and then it's welcome to the 1940s again. What's your chocie?