LPT: Foot traffic should be like vehicle traffic (North America), everyone sticks to their right side.
That implies everyone knows the difference between their, there, and they're.
In London that's exactly what we do, but to the left. And the "right" side is how we overtake.
The point of walking on the left side of the road is for safety. As a pedestrian it is easier to avoid oncoming traffic instead of traffic behind. Inside buildings without cars it doesn't matter but most people stick to the right in my experience.
Welcome to Switzerland
What I really don't understand why Londoners go stand to right side at escalators.
I walk around my university campus. It is unbelievable how many people walk without watching where they are going and just get in other peoples way. Its absolutely chaotic between classes.
Give me your sunglasses, you're throwing out far too much shade.
Any of this only comes into play when passing someone going the opposite direction. Otherwise, you're right, it would be foolish.
However you should never walk with traffic. Walk against traffic so it's easier to jump away from a car that may not see you.