I agree it is easier to use a key, but the reason owners don't break windows is that is damaging.
The main reason a thief wouldn't want to is that is loud and suspicious looking, much more likely to be noticed. People seeing someone they don't know fucking around with smashing a window in town might call the cops, if they seem someone they don't know using a key they assume they were given it by the residents
The main reason a thief wouldn't want to is that is loud and suspicious looking, much more likely to be noticed. People seeing someone they don't know fucking around with smashing a window in town might call the cops, if they seem someone they don't know using a key they assume they were given it by the residents