Interesting statistic but consider the following…
1) It’s easier to kill unarmed children in classrooms than armed policemen.
2) there are way more children in classrooms than there are policemen… so if killing was a completely random act, you would expect more children to be killed in classrooms than policemen.
The things that prevent this statistic from being a constant truism are empathy, strong societal frameworks, and rational though. Unfortunately, there are those among us who lack empathy, lose the ability for rational thought, and are able to find a society through social media that works with a different framework. This is the case of the Buffalo shooter. Others, like the Uvalde shooter, take themselves out of societal frameworks altogether. If someone like this has access to any weapon of mass destruction, there’s not much we can do about it… so our options are to 1) effect the individual (prevent/identify/rehabilitate/restrict) or 2) effect the access of such individuals to destructive weapons.