A few random comments:
Some of the resigning trustees are black, and one of the new ones is white, so not wholly about race.
The fact that the High Court is hearing the case is not a predictor of which way it will go. We'll have to see. Although if the trustees have all resigned maybe Dr Chandauka has won by default and the case will be dropped?
The charity made a loss in its last posted accounts (2022/3); income fell, with donations making a particularly steep fall, and spending rose: SENTEBALE - 1113544
If Harry and friends are out for good, I guess they can say goodbye to the polo income too. But it seems to amount to only 11 million over the course of the charity's existence so maybe it can survive that with other streams of income, and he and Prince Seeiso are still featured quite prominently on the Sentebale website so maybe they will be back.