John,
Equations and theorems are not one and the same thing. I am not quite sure what you are referring to by "Planck's Theorem"; there is Planck's Law, Planck's Relation and Planck's Constant. Planck's law describes the electromagnetic radiation emitted by a MACROSCOPIC black body in thermal equilibrium at a definite temperature. Since it is concerned with a MACROSCOPIC entity (an amalgam, as noted in my previous post), it is not dealing with the fundamentals.
I think you are referring to Planck's Relation: E = hv. As long as you restrict the application of this relation to individual photons, it does appear to be fundamental, since photons seem to be fundamental. But, as was originally the case, if you apply it to a river of photons (a wave), then it is another amalgamation of fundamental behaviors and "emergent" statistical behaviors, like the schooling of fish, that seeks to produce concise descriptions at the expense of lost information; a lossy compression algorithm.
Contrary to popular quantum mythology, waves are not fundamental; they are emergent manifestations of amalgamations of large numbers of more fundamental entities.
Consider an analogy between the flow of a river down a valley and the flow of electrons through the famous double-slit apparatus. Rivers are amalgamations of rain-drops. The so-called "source" of the river, is the point furthest from the mouth of the river. But you will not find many raindrops there. Most of the river's flow originates elsewhere - most of the information content of the river also originates elsewhere. So where does the information content present at the "mouth" of the double-slit experiment (the interference pattern) originate? At the electron source, or "down-river"? It is easy to show that it originates down-river, at the slits, just as the path of the river's flow is determined by the structure of the river-valley, not the properties of rain-drops or their amalgamated river flow. The confusion arises by attempting to treat the source with fundamental, quantum laws, but then trying to characterize their interactions with the walls of the river valley (slits) as purely classical amalgamations, rather then attempting to deal with the trillion, trillion, trillion particles making up those walls. So you end up with a part fundamental (particle) and part classical amalgam (wave) description, that seems much more mysterious than it actually is. But it is no more mysterious than looking at the lips of a ventriloquist's dummy, and expecting to see rivers of information pouring forth. The source of the information lies elsewhere. When you "attribute" the source of information incorrectly, as being an "attribute" of something other than the true source, it is no wonder that confusion and "weird" behaviors materialize to haunt quantum theory.
Rob McEachern