Not sure I agree with your appreciation of the elevator. I don't know where you are (I've never heard "ope" either) but at least in Australia not everyone faces the door in an elevator. I'll copy my own comment left below to someone else:

...you are in an elevator for a very short time, unlike with public transport for example. You might as well be facing the direction you need to go to, so that when the doors open, you go, instead of having to turn and then go.

Second... I regularly take crowded elevators and while it's true that almost nobody stands facing back to the door, it's also true that easily half the people choose to stand sideways, facing the side walls. (Which btw makes someone with a pram or wheelchair easier to get into the elevator). It's a mix of being ready to go and being able to rest your back against the walls of the elevator more than an unspoken social convention.