snip:
In casting these characters for Wargroove, Chucklefish said it reached out to an external casting agency to avoid having "unconscious biases impact who we hired to work on Wargroove, and to handle the auditions blindly." In other words, they chose the actors based on the samples they submitted, without looking at who they are or their specific background.
Such an approach falls neatly in line with the common refrain and excuse given for a lack of diversity in all manners of employment: it's about finding the "best person for the job." Such approaches often incorporate biases in how they define "best" and conveniently ignore how difficult it is for marginalized groups to even be in a position to be considered to be the "best person for the job," and so the cycle continues. In this case, the process determined that the best people to voice and help bring to life black characters were white people.
"We also understand that posting photos of our voice actors besides characters of colour without acknowledgement of the systemic problem of representation in the industry was insensitive and poorly communicated," continued the statement.
Chucklefish also said it told the casting agency the characters were non-white, but noted that "ultimately the decision and responsibility to blind cast was on us, not them."
The choice of blind auditions meant they were likely picking from a pool of mostly white actors, because like many industries, that represents the majority of working actors. If you want diverse options, you need to explicitly put in the work to find and hire such people.