"In what other profession do you need panic buttons?"
I'm just gonna look awkwardly at bank tellers, convenience store clerks, and so many other front-line customer service jobs that either have or would greatly benefit from a panic button to deal with dangerous customer interactions or outright robbery.
I used to work in a hospital laboratory. You bet your butt we have panic buttons that call security to our spot when needed. And notice I said when and not if, that's because they do get used once in a blue moon.
I've seen crazy patients, crazy coworkers, and crazy coworker's relations trying to start shit causing the need for security to be called. Seriously hospitals are a concentrated cesspit of people experiencing high emotions/stress at the worst time in their lives. I remember the panic buttons being installed almost 2 decades ago after an incident where a coworker's partner showed up one night and beat the shit out of them in the middle of the lab.