I think this glosses over one benefit of monitoring: someone should be coming in the event an alert condition is triggered.

For example, if I was shot during an armed burglary, it is more likely that someone would be coming to my aid because of my alarm system than without it.

I personally don't feel more safe because of my alarm system. But, I do feel more hopeful that if my (or my spouse's or children's) safety is endangered, that someone will be coming that can increase the likelihood that we will survive that danger.