We can take it even further and look at underlying rates of criminality. As far as I am aware, all the data shows that there is no statistically relevant difference between races in rates of criminality. But minorities are all statistically more likely to have police encounters, and all the rest flows from there.
As for the race of the officers, its relevant to a degree, but this is where institutionalization comes into play. Police policy and procedure has revolved around use of force for decades, rather than deescalation. For example, IIRC, STL area police academy devotes 120 hours to firearm training and only like 8 to deescalation. When shit hits the fan, people default to instinct, habit, and training, which for police is overwhelmingly force related. So the race of the officer is relevant, but not conclusive. If a black officer encounters a black man going through a mental health crisis, but has never been fully trained on how to non-violently handle a person in a mental crisis, whats going to happen? They fall back on what they have been trained to do.
The emphasis on use of force is because indecisiveness in its utilization is what gets cops killed. It's not hard to find videos online where an officer hesitated and it cost him his life.
And I'd have to see the statistics myself that there is no difference between race on criminal offenses. I suspect there is a difference; but the true discussion is the underlying cause.