Just think of Yosemite National Park firing their only(?) locksmith. It sounds like the most boring job but such a big park and many buildings. As soon as someone locks themselves into or out off something it becomes highly lucrative for a contractor to do this task. Replacing broken locks or cutting new keys won't get cheaper. It will be the same on many other levels.
https://www.washingtonpost.com/climate-environment/2025/02/1...
https://www.instagram.com/natevince/p/DGLxMKbyKwq/