Those that fail to learn from the mistakes of others will make the same ones.
'Armchair quarterbacking' is not the same thing as analyzing what happened and how it could have turned out better, especially if one day YOU are in that situation.
And that is why you analyze such incidences and see if there was a better way it could have been done.
And do note, people such as Jim Cirillo (a cop) and Lance Thomas (a jeweler), went against much greater odds and didn't end up firing all over the place.
So learn from history least you repeat it.
“To you who call yourselves ‘men of peace,’ I say, you are not safe without men of action by your side” Thucydides