I agree that it is has been a "pandering" move on the part of Democrats to "promise" a given position to a specific minority and/or gender. The plan might BE to name a Black woman to a given post, but to make that plan public, especially ahead of time as it was in this case and in the Supreme Court nomination of Katangi Brown, diminishes the appointment.
For example, I am not sure I would delight in being named to the Marriott Board of Directors because they were looking for an overweight, over-70 balding white man. I would be happy that I was the best of that litter, but I'm not sure how much bragging rights I would have earned.