It is critical not to confuse atomic-scale phenomena with real-world scale.
I've seen people try to use the uncertainty principle to try and prove things don't exist. Dropping a rock on their foot usually cures this.
On the other hand, nuclear fission started out as small-scale observations too. How many people would have made a connection between cloud-chamber streaks and exposed film in drawers, with 1000 MW power plants and city-busting bombs?