Don't confuse scientific models with truth or reality.
Quantum mechanics, relativity, Newtonian and Aristotilian dynamics are all models that, in certain situations, do a good job of predicting reality. Light is not a probabilistic model any more than it is a particle or a wave. It is light and every way we currently have of understanding is an inperfect model -- even if we don't understand just how it's imperfect yet. If the history of science has taught us anything, it's that.