With all due respect, knowing that you are a locksmith, I stand by my statement. And this is why; "MOST" thieves are thieves of opportunity. Of course, there are thieves who break locks (probably cheap locks), but they target their victims and they are far more rare- they are not “MOST” thieves. Also, I said, “good locks,” so how many bikes have you heard of being stolen, locked up with a Kryptonite New York Fahgettaboudit U lock? To quote a phrase by Sheldon Brown, "this just doesn't happen in the real world." However, it is possible that this has happened just as it is possible that many things have happened, but I would argue that it is isolated and rare, if it has ever legitimately happened at all. And often the defect was due to the way the bike was locked… where the bike was locked. Again my point, there are allot of thieves in the world, now, either “MOST” thieves are able to break good locks or “MOST” thieves are not able to break good locks? And of course, all of this begs the question as to how many thieves are merely thieves of “opportunity” as opposed to “professional targeting” thieves (driving white vans, carrying around angle grinders, power cords, oversized bolt cutters- or skilled professional lock picks)? I would say they exist in the minority, wouldn’t you?

Now on a similar note, if the world has 1000 thieves (hypothetical), are the majority of those thieves “opportunistic thieves” or professional targeting thieves? If the majority of thieves are “opportunistic thieves” then I am afraid my point must stand, ‘most thieves will never be able to break good locks no matter how hard they try.’ Why? Because they don’t have the skill or the tools, they are not professional thieves. Locks do more than just deter they also actually protect; they secure.

Respectfully
Jack