While this is true, there is an abundance of evidence that police use a disproportionate amount of force against black and poor people compared to white and rich people. Nobody is holding a completely black and white thinking. The expression of it is cynical sarcasm as a rethorical tool not a literal statement of fact (at least in such an overwhelmingly large amount of case that it should be considered a norm to ease communication). Not recognising this is trying to strawman someone.
Obviously it is not a literal statement of fact, but the idea that it generally a rationally derived and nuanced rhetorical tool is equally false.
And the extent to which any disparities in police killing statistics are racially motivated is very difficult if not impossible to actually work out.
We don't assume that the fact 95% of victims are male is due primarily to misandry, but understand it has to do with behavioural patterns, situational factors and
perceived threat based on experience. That is the consequence of the way the human mind works, we are flawed pattern recognising machines.
Do you know, for example, if black officers shoot black people at significant lower rates than white officers?
As for how the media would have reacted had the police officer failed, it's probable it would have been met with cries of outrage.
That's what you get when you create a society where individual social media videos and political hot takes on them are key factors in creating the political 'reality' in a country of 350 million people.