Why should you not wave someone across a pedestrian crossing?

Waving someone across a pedestrian crossing might create a false sense of security for the pedestrian. The primary concern is that while you signal them to cross, there could be other vehicles approaching from different directions. Traffic laws dictate that vehicles must yield to pedestrians at marked crossings, but this does not guarantee that all drivers will adhere to the rules. By waving someone across, it could lead them to believe that it is entirely safe to cross, potentially putting them at risk if another vehicle is approaching at the same time.

In a situation where drivers may not be aware of the pedestrians or may be too focused on the road ahead, waving could create confusion about who has the right of way. The safest course of action is to let pedestrians make their own judgment about crossing based on the traffic situation, rather than encouraging them before checking the oncoming traffic. This helps ensure their safety and prevents any unfortunate accidents.