[the_gastropod]

While I get your point, I do think there's an important distinction: train lines are rare, usually far away from where people live, walk, bicycle, etc. Roads, on the other hand, occupy a significant portion of public land in our cities. It's not great that it's effectively a death sentence to be less-than-focused while walking home.

You know the old saying "with great power comes great responsibility". The onus for being responsible is not on the pedestrian. It's on the person (or CPU) operating the multi-ton machine at speeds that can kill.