Ohhh but I can produce all the experiments that have a verifiable and reproducible result and get the SAME result every time. For instance, I can turn a light on, and even though I cannot see individual photons, the dark goes away. I can do it again and again. No, I don't have FAITH that tells me the photon exists. I have scientific facts that explains it. And I can do it any time I want. Uhhmmm let me just pay my electricity bill quickly ;)

So no, I don't need to be a physicist to know the photon exists. Cause and effect.
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Extraordinary claims require extraordinary evidence - Carl Sagan