How about insurance? Technically an insurance company could require good locks (for some deal), but wouldn't pay any attention to the fact the door itself is insufficient to make any difference.

Btw... How is it in Canada? I have noticed in American movies and series that doors always open inwards in the USA (unless it's just the TV and movies).... Over here they always open outwards. Thus, in the US the lock would be the only thing preventing a door from being kicked in (or rammed to be realistic). Over here, you would actually need to break the whole door into pieces or the door frame to gain the same effect. In that sense one might think structurally very sound locks would indeed be essential in the US. But like I said, I don't know about Canada.