.....
In your opinion is there nothing to be done then?
.....
In my opinion there is nothing that will be done, because the cops are pretty entrenched in their 1* mentality.
What should be done (again IMO) is cops should realize, (and internalize) that they have signed up for a job that entails risking their lives and persons, and it is their duty to make sure they don't harm someone they are sworn to protect, even if it means waiting and getting shot at (or shot). I think that would require a huge paradigm shift in the culture of Law Enforcement in the US, and from my experience working with cops, there's no chance it will happen.
Cops like playing with their plate carriers, and M4s, and 5.11 pants and playing all military, but they missed the part where military folks all know that sometimes they die to accomplish the mission. Being expendable is part of the gig, and while you hope not to be expended, sometimes it happens. The "mission" for law enforcement is (or should be) foremost, preserving the lives of their fellow citizens. If you buy it to accomplish that mission, you buy it.
But currently, the mission is to get the perp, and if innocents buy it to accomplish that mission so be it. It's not just stuff like this, or Philando Castile, or that guy they capped while he was crawling down the hallway, it's basic culture. NYPD shoots to slidelock damn near every time they pull a trigger. What's their hit ratio? Where do those bullets go?
The departments which I interact with do train their officers to be more aggressive during an active shooter call. The trade off as they see it is that the increased risk to innocents from police is overshadowed by the increased risk to innocents by allowing the situation to go on longer.
The first part of that only works if you're good. The SAS can be super aggressive during a door-kick, because they are good, and have good intel. You don't get to be that aggressive if you are running in without a trained team and with no intel. You can aggressively
enter the active shooter area and make yourself known. That is shown to help bad guys decide to cap themselves, but you can't be aggressive about shooting people with bad tactics and bad intel. That's not acceptable, and the fact that some departments think it is shows they aren't as professional as they think they are.
The second part of that quote, about weighing the risk to innocents, isn't really the department's call. It's the people being risked. I think a growing number of the people being risked are starting to disagree with Law Enforcement's risk management decisions.
Not all cops are bad people, but Law Enforcement (in the US) is a culture that takes good people, and pretty efficiently turns them into bad cops. What should be done? I honestly don't know, but continuing as we have from about 1980 through 2019 is untenable. Similarly just defunding departments and going all Lord of the Flies is a bad idea.
Dunno, but like society as a whole I have come to believe even if there was a solution that will avoid violence, folks are too entrenched in their sides to take it.