Which is why McNally (the youtube in the title) demonstrating poor locks that can be opened by simple bypass attacks like shimming or whacking is especially damning for those locks. You can always destroy a lock with brute force, preferably power tools. You also spend years honing your lock-picking skills and open any keyed lock in less than a minute, but good locks make this a difficult craft. But shimming a padlock or whacking a masterlock with another masterlock takes no skill, doesn't leave evidence and allows you to relock it when you are done. It defeats every protection the lock was supposed to provide

Yep. There’s a safe engineer on YouTube who was explaining the history of dial combination locks commonly used for government filing cabinets, etc. He pointed out that you can drill them in minutes but you’d need several hours to make good the damage such that the break in wouldn’t be easily detected. The combined time is therefore the ‘strength’ of the security. (Also, why it might be a good idea to have open sensors on safes, cabinets, etc)

> They produce evidence of tampering.

That's why one of the more advanced challenges in lock picking is to minimize the amount of evidence you leave. Eg even a normal pick can leave some scratches on and in the lock in different places than a normal key.

If I remember right, 'bumping' is an interesting technique partially because it leaves even less of a trace.

Yup, I've got a three bolt break in resistant front door in my house, but right next to it is a window that can be breached in .5 seconds by yeeting a brick though it. But both will leave traces if they've been forced so my home owner's insurance should cover any losses / damages.