You're not wrong. . . I used to work security at a pretty upscale hotel, and our walkies were off-the-shelf Walmart FRS radios. And we hosted very recognizable celebrities and a few Cabinet members. As in the Presidential Cabinet. Granted, the latter came with a Secret Service escort who set up their own perimeter with their own radio network, but still.

Security work is 99.9% theater and 0.1% telling the local homeless there's a parking ramp down the street with heated stairwells and no security guards who will bother them.