Comment by dfxm12

Security theater. Intimidation. Calling the cops. Insurance requirements.

Neither stores nor the guard want to escalate a situation to a violent situation. The stores don't want bad press or liability for collateral damage. The security guard isn't trying to put their body on the line for some merchandise. Yeah, maybe you have a cowboy looking for trouble, but based on my experience talking/working with some guards, I'd be surprised if they are instructed to get physically involved.