That's EXACTLY what I was when I worked security, and I doubt that it's changed much over 30 years and in a different state.
The problem is "security" is a very generic title. It includes under the table bar bouncers, the guy manning a sign in sheet at an office building, nuke plants with AR's, patrolling low income housing (some as SPO's, some not, all responding to 911 calls, a few companies in Boston come to mind here), loss prevention, alarm response, disaster relief teams like the ones scrambled from around the country to respond to hurricanes in the South, bodyguards, hotel concierge, fed contracts at FLETC or military bases, interstate prisoner transport, hospital security wrestling Section 12's,
Thousands
Standing
Around, 3rd shift handling the keys at a factory, armored cars, retail security accepting deliveries for the store after hours, nightwatchmen, the guy in charge of setting the "this is how fast you should surrender" policies for bank employees, guards at battered women's shelters, the armed crews doing forced shutdowns/takeovers of banks and their assets during the savings & loan crisis for the FDIC, ushers in churches, and the countless barely paid, never trained companies around the nation who provide someone who can scratch out a report and maybe call 911 if something happens. The most common kind is probably that last one, the stereotype. But the training, duties and compensation vary widely.
Self defense. I feared for my life and safety of others, as well as instructed in loud clear voice,numerous times to stop. That's when the plaintiff continued to be non-compliant and aggressively attack me.
That comes off as...flirting with fiction.