The lesson he’s trying to teach, is that there is no ‘right’ lock, only ‘better’ locks. Layer your security and have an honest assessment of threats and replaceability. Locks really only:
Keep opportunist thieves honest
Raise the skill threshold needed to bypass, and
Take longer to bypass, risking detection for the attacker
#1 Can be achieved by the most bottom tier vendor-garbage stacked zinc/brass body lock
#2 & 3 Is where most lock ratings come from, but nothing is perfect.
This monstrosity is what the military uses on secure ammo dumps, vehicle storage, etc and that thing still gets other dudes with guns protecting it. If the Army left it completely unguarded, things like thermite, oxy-acetylene, or grinding would not have any trouble getting past.
Inversely, your mid-to-good bicycle cable lock outside the corner store only really works because of the risk of exposure as people leave and enter the store. Bolt cutters might be a two-minute job all said and done, but there’s significant risk of discovery mid attempt.
The lesson he’s trying to teach, is that there is no ‘right’ lock, only ‘better’ locks. Layer your security and have an honest assessment of threats and replaceability. Locks really only:
#1 Can be achieved by the most bottom tier vendor-garbage stacked zinc/brass body lock #2 & 3 Is where most lock ratings come from, but nothing is perfect.
This monstrosity is what the military uses on secure ammo dumps, vehicle storage, etc and that thing still gets other dudes with guns protecting it. If the Army left it completely unguarded, things like thermite, oxy-acetylene, or grinding would not have any trouble getting past.
Inversely, your mid-to-good bicycle cable lock outside the corner store only really works because of the risk of exposure as people leave and enter the store. Bolt cutters might be a two-minute job all said and done, but there’s significant risk of discovery mid attempt.