Some variation is unavoidable, but statistically significant variation isn't! Why should people in those underpriviledged groups accept a society which gives them fewer chances?
> There are thousands of homeless white men in my city. Maybe police interactions might be calmer for them, but what does it matter for somebody whose life is sliding downhill often by their own addictions?
Yes, it does matter? If police interactions are calmer and you live longer, you have more chances to turn your life around. We as a society have more chances to help them.
> This is why the focus on race seems like such a distraction to me. We could be helping the poor when we're still too busy discussing race and ethnicity.
We should help the poor, and we should work to remove disparities between races and ethnicities. Why are those things opposed in your mind?