How many of those people were armed and initiated violence with the police?

About 50%. But why does the police have more lax rules of engagement than the military does?

And what about the other 50% who could've been apprehended without being killed?

And that's not even mentioning the dozens of people who die every year from police conducting "wellness checks": https://www.google.com/search?client=firefox-b-1-d&q=wellness+check+murders

This situation is outrageous compared to almost every other developed nation. It's a simple matter of police who do misconduct, need to face justice for that misconduct. Simple as that. We have a broken justice system that gives police special priority, so they can literally get away with murder. And they do. And now that corruption is rampant in the police system itself, because it has gone unchecked so long.