Oh come on. Have you ever tried to find one person who actually, literally believes that the lives of black people do not matter?
You'll certainly find 11-year olds in Call of Duty who will say it for shits and giggles to control you; you won't find anybody who actually believes it.
I personally know dozens of people who don't care at all about black lives one way or the other. I've seen hundreds more that I don't know personally demonstrate that belief publicly, many of them police officers.
The disparities in policing, application of police violence, and prosecution are well-documented.
This is why the movement exists. It's a real problem, whether you personally have experienced it or not, whether you personally wish to acknowledge it or not.
There are many people out there who simply do not think that it matters whether or not black people live or die. Many of them are in uniform.
The fact that you believe that is probably most of the problem.