So one could tap this behavior for a source of randomness...but this is always to be understood with respect to a system with no detectable, orderly connection to the system generating the randomness. Many other contrived systems of behavior could serve the same role.
I suspect that the overall behavior of the atom or particle undergoing the weak force occurs within a given context and that context is an orderly one even if we cannot observe that level of order. This, of course, is a speculation that goes beyond the current scientific understanding.
More than that, it directly contradicts the modern understanding. We understand the weak force fairly well at this point. And it is a quantum field theory, just like the field theory for electrodynamics. And, for example, the *timing* of the decay of a neutron is random, even though the averages give a predictable half life if we have enough neutrons ( I use neutron decay because it is mediated by the weak force).
However, it is more than just a belief on my part. Looking at the systemic nature of the vast majority of natural systems we can see that this random behavior within an overall order may indicate an unknown systemic behavior in which the weak force participates.
Consider as an analogy the cooling of a cloud of gas in a static volume. As the gas cools the individual atoms undergo changes in kinetic energy in a entirely unpredictable way. Although we understand the laws of physics that apply to atoms and their kinetic interactions, we simply can't measure all the atoms in a gas or even one atom in the gas, nor can we measure their trajectories in such a way to make a prediction as to when one or another atom will collide and what their resulting kinetic energies will be. But we can on a statistic level of the whole.
And that is what puts the kinetic theory of gases as a *chaotic* phenomenon as opposed to a *random* phenomenon as in quantum mechanics. In kinetic theory, the randomness does, in fact, come from our ignoring (or not knowing) some relevant information.
Now, I have to hedge a bit here. Modern kinetic theory is based on the quantum behavior of the molecules in the gas. And this quantum behavior does have a macroscopic effect in the heat capacities of gases. This was actually the first recognized deviation from classical physics.
The quantum aspects become even more important in solid state theory. Once again, though, the randomness at the quantum level tends to be averaged out at the macroscopic level *except* that some aspects of conductivity (for example) would not happen at all without the quantum aspects of the electron (that it is a fermion and not a boson).
So I think that randomness does exists, but I doubt that it exists in a vacuum without some amount of orderly behavior suggesting that it is not intrinsically random, only random with respect to another frame of reference.
Well, the current evidence, primarily from the violation of Bell's inequalities, says that this is probably wrong, at least if you want to keep anything like local causality.