Makes sense. Black people are statistically more likely than average to be stopped by cops for suspicious behavior, and statistically more likely to be the target of police violence when stopped for any reason. White people are statistically more likely to call in the presence of a Black person to the police than a person of another race, and that report is statistically more likely to result in a confrontation with the police when the person reported is Black.
So while in reality you're talking about a fraction of a fraction of a percent of risk, the math checks out that a Black person is "more at risk from police" hunting Pokemon than a white person.
I'm not sure what the controversy is here. It's all just basic statistics.