Because indulging such impulses is a good way to get them to proliferate. I see your approach is to treat them as matters of fact and try to redirect them towards some less-lethal-than-guns solution for mutual benefit, but this is just going to give you more of what you don't want.

Right now a police officer in my area is typically equipped with:

baton; taser; pepper spray; knife; handgun

shotgun (in the car); flashlights (high powered, doubles as a club in a pinch)

5 weapons, with others in reserve, is already a lot to carry. Indeed, it's partly because of this proliferation of weapons (and all the training and liability issues that go with them) that many police are under-trained in physical combat (this from undercover and head-of-training officers I've known, whose opinion I'm inclined to take at face value).

So you've got heavily armed individuals who are trained/socialized to maintain a somewhat irrationally elevated perception of danger and most of their training if focused on using weapons to induce coercion. This is a bad combination. not just for the job and the public, but for the police themselves. I know a former police officer who doesn't keep any weapons in the house, but who's also paranoid about crime because he's been rtained to think about all the bad things that could happen to the point that he's afraid to hire someone to clean his house because they might case it on behalf of burglars or home invaders. This despite the fact that he doesn't own anything especially valuable; he lives in an ordinary suburban home and probably has less stuff than most people.