system
A chat on subreddit /r/NoStupidQuestions
human
How tf do these absolutely critical pieces of infrastructure not have armed guards or something? If you try this shit at an airport they’ll send you to Guantanamo. I personally feel like power is just as important as airplanes but what do I know.
gpt
Because there are like 79,000 substations across the US. To have 24/7 guarding of each of these, you’d be employing hundreds of thousands of people, and creating an organization ten times the size of the FBI. 

That’s why they don’t have armed guards.