And yet, jaywalking pedestrians get killed daily, despite their best attempts at determining whether it's safe to cross. The problem with allowing drivers to use their best judgment as to whether it's safe to continue through a red light (after stopping) is that a non-zero percent of those drivers will fail to judge the situation correctly, especially during an edge case they rarely encounter.
It's impossible to get hit by cars if there are no cars around you. Vehicles are not going to materialize out of nowhere and crash into you. They are going to be funneled into your path by the roads. If you look at the road and see zero traffic, then you cannot be hit by traffic. Even if you run a red light.
Obviously, if you can't see the road where the cars will come from, then you cannot know if there are any cars coming towards you in a potentially intersecting trajectory.