As an analogy, a truck driver might be less likely to crash or be killed on any specific drive than I am. However, a truck driver also drives a lot more than I do, so a truck driver is still more likely overall to die in a vehicle crash than I am.
In the same way, even if we lived in a world where blacks were less likely to be killed in an individual police interaction, that doesn't change the fact that a black person is still more likely overall to be killed by a police officer than I am.
Naming issues aside, reducing the amount of time the 'truck driver' spends on the road is one of the biggest goals of the "defund the police" movement. But again, that's a separate discussion.