Your point is valid, but reading "there is no reason" literally misses the intended meaning, which is "this is unacceptable and cannot stand".
What is your proposed solution?
It’s tragic, but many orders of magnitude away from your claim.
It’s not the quantity that makes it horrible, tragic, and infuriating. It is all those things because it’s evidence of a larger systemic issue which includes lots of other awful things that fall short of homocide; and it’s largely unnecessary.
[0] https://www.cdc.gov/healthequity/lcod/men/2017/nonhispanic-b...
[1] https://www.statista.com/statistics/585152/people-shot-to-de...
You're right the quantity isn't specifically important but it does illustrate that there is a problem. Even if it is not the #1 cause of death it is disproportionately higher.
For what it’s worth, black men kill more cops than cops kill unarmed black men.
Regarding your second claim, I can't find those numbers. The closest thing I can find is this newsweek piece [2] with data from 2013 and 2014. That suggests most people who kill police are white. But it also includes prison guards as police.
[1]: https://www.latimes.com/science/story/2019-08-15/police-shoo...
[2]: https://www.newsweek.com/who-kills-police-officers-315701
There is no reason for them to be killing as many people as they do.
Yes, there is absolutely a reason. There is a reason for everything. If you want to fix it, you need to set your emotions aside and get to the root cause of that reason. If you continue to deny that there is a reason, you can expect the same tragic result.