> why should the weirdness of quantum math cause so much trouble?
The deep issue is not the weird math - that's just math and it's not even particularly weird - mostly just differential equations and complex numbers. It's the weird behaviour of physical reality that's puzzling. Take for example entangled photons going through detectors a long way apart. The state of the detector at one end has something like a faster than light effect on the outcome at the other end. It's easy to write equations for it but how on earth does it work?
The deep issue is not the weird math - that's just math and it's not even particularly weird - mostly just differential equations and complex numbers. It's the weird behaviour of physical reality that's puzzling. Take for example entangled photons going through detectors a long way apart. The state of the detector at one end has something like a faster than light effect on the outcome at the other end. It's easy to write equations for it but how on earth does it work?