I worked on port facilities. Everything corrodes quite quickly, and locks and keys need to be replaced fairly regularly. Once, there was a problem with key management following the replacement of locks on a building containing emergency diesel generators.

The doors were heavy, 45-minute fire-rated security doors, aka "Fucking heavy doors that can cut your fingers just from inertia or wind.".

These doors had to be opened quickly in the middle of the night. There was no locksmith on call, but there were boilermakers. Supports and a chain were welded to the doors, and a T-Rex container mover was used to carefully pull the doors off the building.

The whole operation took less than an hour. Physical security is a matter of time and resources.