SHOW SOMEONE WALKING from one side to the other in a photograph and you have the potential to tell a story. But the story you tell depends on their position in the scene.
Place the person on the far left (assuming they’re walking from left to right) and we can see how far they’ve got to go. Place them on the far right, and the viewer can see how far they’re already come.
But if you place them in the centre they’re just occupying space. As with portraits, the centre is rarely the best location: it’s a static position, that has no sense of drama or movement.
If you have the opportunity to tell a story, then you should take it—and make the most of that narrative.