My parents had numerous sayings. “Locks are for honest people: was one Dad used to say. If you aren’t familiar with the saying, basically it means locks will only keep out honest people. Dishonest people will find a way around locks. The easier the lock is defeat, the more likely a thief will break it. I would extend this to passwords as well. Type in 500 bad passwords in your favorite or least favorite search engine, and one thing you will notice many on the list have been on the list a long time. Some old ones will drop off to be replaced by some new ones.
The flip side is some hackers love a challenge and will see a complicated password as a challenge to be overcome. Ideally, you get a good password that isn’t challenging or too easy.
Another point is a lock only works if you use them. Car thieves will go a street looking for unlocked cars. If the car is locked, they generally pass it by. Invariably, there is usually at least one vehicle that is unlocked on most streets. A skilled car thief can break into your car and get it started fast.
A neighbor’s son took his bicycle to a nearby convenience store and didn’t take a lock. It’s a busy store, but in the short amount of time he was there, the bike got stolen. No matter where I go on my bike, I find something to lock it. It may be a handicapped sign, a lightpost, or a fence. In some cases, I may have to lock it nearby if there isn’t anything I can safely lock it up.
When I am home, I keep my door locked. I live in a fairly safe neighborhood, but that doesn’t mean that we don’t have break-ins.