No one I know feels safer with armed police around and tensions frequently escalate with them around. We all go, "this man has a gun and could kill us - he will do it too because he knows he will get away clean and free."
Training isn't sufficient. If there are real consequences for police and it shows that they face the same consequences the rest of us do for many years - maybe then. But that day will not be for 10+ years. For now, it's much easier to say and act on taking away their weapons that are meant to kill people.
I guess that if you feel unsafe around armed security guards I can't argue with your feelings