It is shocking because they did it after the investigation had started, which is monumentally stupid.
You can destroy any records you want at any time, unless there’s an investigation underway or you have good reason to believe one will be starting. At that point, you’re destroying evidence.
I have no doubt there are smart employees, but they don’t call the shots. Case in point.
The dude set up a strawman argument, then didn’t even bother to burn it down properly.