The trouble with issues like this is that people only learn ONE part of physics and ignores the rest. And when they do that, they are also ignoring something that could make their guesses utterly wrong.
Let's get ONE FACT VERY clear. There is a distinction between the quantum world that is described by QM, and the classical world that we are very familiar with. You do NOT normally observe quantum superposition, entanglement, phase coherence, etc... etc.. in our classical world. Even when such weird phenomena manifest themselves at the macroscopic scale, most people don't recognize it (example: superconductivity). Thus, our world is VERY different than the quantum world. If not, we would not be able to use classical laws to build our houses and make our vehicles run.
So already there is a problem in extrapolating QM phenomena into the classical regime. We just don't see it, nor can we measure its effects. But there is another often-neglected aspect of physics that could throw a severe wrench into such extrapolation - the study of PHASE TRANSITION.
Any physicist worth his/her salt would know what this is, and why it would be relevant here. In a phase transition (such as going from ice to water), the thermodynamical behavior that is valid in ice cannot be extrapolated into the water phase. It just won't work! There is a
discontinuity of several thermodynamical variables right at the phase transition. It means that the trend that we see in each phase cannot simply be extended through to the other phase. They behave differently right after that phase transition.
Now, no one knows if the distinction between quantum and classical world is similar to a phase transition, or simply a continuous crossover. Studies that are continuing in this area are starting to indicate that
https://www.physicsforums.com/showpost.php?p=1315661&postcount=42" as a quantum system is coupled to a large degree of freedom. But regardless of that, our knowledge of what goes on with phase transition should make
everyone weary of bastardizing QM in such manner. You simply cannot extrapolate the phenomena and description of one regime into another without ample justification. So far, there's none. In fact, there's mounting evidence that you just can't do that.
This is what happens when only one aspect of physics is taken while the rest is ignored. Physics cannot be used, much less understood, in bit and pieces. It is ironic that the argument of "interconnectedness" on things here actually ignores the interconnectedness of various areas of physics.
Zz.