It’s just an example. Like Breonna Taylor, who did nothing wrong, whose boyfriend (Kenneth Walker) did nothing wrong, while the police did multiple things wrong and ended up killing her.
But even looking beyond individual examples, the data shows police killed over 1,200 people in 2023. That’s a problem.
Source (PDF)
Yes, there are 300 million but that negate the problem of police violence. You could make this argument about anything: gun violence, car crashes, even cancer. Their deaths are all a percent of a percent of the population.
No one is saying police violence is the number one killer in the country. The issue being raised is one side is saying it’s a problem and the other is saying actually it’s not a problem at all.