"Errr... why do we need a 'force equalizer'? It's not as if we are beset with armed criminals. It is a rare occurrence. You don't seem to get that. You talk as if we all live on the mean streets of Detroit (over 400 gun deaths in 2013 with a population of 700,000). Why don't you accept that what we do works compared with the US? You cannot argue facts and figures because doing so just makes you look stupid. "
A force equalizer levels the playing field somewhat. In confrontations it's quite often the case that the stronger person holds all the cards, guns go some way to addressing that imbalance. A gun gives a physically weak female pensioner a better chance to protect herself from a muscle bound powerlifter than she would if she had no weapon. As I've pointed out, there are times when pulling out a gun has stopped an unarmed attack, whereas if there was no gun, the victim may have been beaten up anyway after handing over his things, or may have chosen to fight the attacker and injured either the attacker, himself, or both. The production of that gun resolved the situation peacefully, with neither party injured other than the pride of the would-be attacker being a bit dashed when he was forced to leave.
"And you're kidding yourself if you think civilians with guns have the same level of training as the armed police."
Surely that depends on how much training that civilian decides to invest in. They get a choice on how frequently and how thoroughly to train, so some may not be as skilled as armed officers, but there are courses available to civilians, taught by qualified police instructors, so to have a blanket assumption that no civilian will have the same level of training is quite wrong.