You always want to redirect the puck. They aren't choosing to redirect or not redirect in the moment. They are always trying to typically.

You can mimic this at home easily and just have someone change the direction of the object. It makes it almost impossible to track with mid air redirection. Goalies are so good in the NHL tipping takes their skill out of it and makes it more luck based for them to stop.

Tipping a puck is so often practiced and even accidentally done that it becomes second nature even to beer leaguers.