Harry Potter Wizards Don't Do Enough To Solve Real-World Problems.

See, I feel like in the Harry Potter world, way more wizards would have become involved in things like nuclear physics. I mean, just because you have access to special areas and energies and sciences the muggle folks don't, that's no reason to so thoroughly spurn their sciences! If only for self-defense and study. Imagine a corps of wizards with special training who could just slip around highly-secured areas unofficially decommissioning bombs, using specially-designed spells researched and developed for the express purpose.

I mean, heck. Wizards are kind of fucked too, if the world goes boom.