And in addition: the weak spot often isn't the lock but the window next to it, the door frame or similar. The lock prevents somebody from getting in by accident

And in addition: the weak spot often isn't the lock but the window next to it, the door frame or similar. The lock prevents somebody from getting in by accident (I had my drunk neighbor once trying to get into my place at night ...) but the typical door and lock don't protect against somebody who wants to to get in. For that protection you have to pay a lot more